Unit5 The human brain 重点语法：条件状语从句进阶练100题-2024-2025学年九年级英语上册重难点讲练全攻略（牛津上海版）

2024-2025学年一线教师制作精品新课系列资料，已编校！ 2024-2025学年一线教师制作精品新课系列资料，已编校！ Unit5 The human brain 重点语法：条件状语从句进阶练100题 语法知识精讲 常用连接词：if, unless, as/so long as，on condition that等。 1.unless = if not Let's go out for a walk unless you are too tired. =If you are not too tired, let's go out for a walk. 2.主将从现原则 As long as you feed him, he will be cooperative. 3.祈使句+and/or/otherwise +一般将来时 If you use your head, you’ll find a way. =Use your head and you’ll find a way. 语法知识精练 1．Computers can do different jobs ______ we give them different programs. A．if B．although C．before D．so that 2．If Rose the interview next week, she will have the chance to work for the school studio. A．pass B．will pass C．passes D．passed 3．________ kids have smartphones, they may get calls from strangers and get cheated. A．If B．Until C．Though D．Unless 4．_________ you obey the rules, you will be punished. A．If B．Since C．Unless D．Until 5．You won’t have a better view of the village ________ you reach the top of the hill. A．because B．unless C．when D．if 6．In summer, food will go bad quickly ________ we put it into a fridge(冰箱). A．if B．unless C．as soon as D．after 7．I ________ angry if my daughter ________ the truth. A．am; will tell B．won’t be; told C．will be; tell D．won’t be; tells 8．You ________ your friends better if you can stand in their shoes. A．will understand B．understood C．are understanding D．have understood 9．You will fail the test ________ you study hard. A．if B．unless C．though D．because 10．You won’t attend the meeting on time ________ you don’t hurry. A．before B．though C．until D．if 11．—What fine weather! Why not row boats on Fengcheng Lake together? —Sure, if your homework ________ by noon. A．finishes B．is finished C．has finished D．will be finished 12．You mustn’t drive a car on the road ________ you get a driver’s license. A．unless B．if C．since D．although 13．—You needn’t take an umbrella with you unless it ________ tomorrow. —Yes, you are right. A．is raining B．will rain C．rains D．rained 14．According to the law, we can’t share others’ personal information ________ they say it’s okay. A．if B．unless C．when D．since 15．I don’t know ________ or not he will come here. ________ he comes here tomorrow, I will call you. A．whether, Whether B．if, If C．if, Whether D．whether, If 16．If I _________ the driving test tomorrow, I will have another try. A．will fail B．am failing C．failed D．fail 17．—It’s hard for Tina to succeed in losing weight. —Yeah. ________ she eats less and exercises every day. A．Unless B．After C．If D．Since 18．The motorbike is _________ old that it can’t be used any more _________ some of its parts are changed. A．so; if B．such; if C．so; unless D．such; unless 19．I don’t know if Jim ________ hiking this afternoon. If he ________, I’ll tell you. A．goes; goes B．will go; goes C．goes; will go D．will go; will go 20．You’ll never know the truth ________ you go out and look for it yourself. A．if B．though C．unless D．since 21．I always sleep with the window open ________ it is really cold. A．unless B．if C．because D．or 22．—Paul, do you know if Sam________ to Jenny’s birthday party this Sunday? —I think he will come if he________. A．comes; will invite B．will come; will be invited C．comes; invites D．will come; is invited 23．—Will you go to Lisa’s party next Sunday? —Well, if I ______, I will go on time. A．invite B．will invite C．am invited D．will be invited 24．I won’t go to the movies this evening ________ I’m free. A．or B．unless C．because D．than 25．—________ some extra money is found, the library will close. —Don’t worry. The government is giving a hand. A．Unless B．Although C．Since D．While 26．You won’t fully understand the value of literature ________ you read it for yourself. A．because B．unless C．if D．whenever 27．As we live in a rapidly developing world, we will be left behind ________ we keep learning. A．unless B．although C．if D．until 28．You won’t achieve your dream ________ you stick to your goal for a long run. A．though B．if C．unless D．after 29．Nobody can hear you _______ you speak in a louder voice. A．when B．if C．unless D．after 30．—Would you like to play football with me ________ it doesn’t rain tomorrow? —Sure, ________ I am busy. A．if; unless B．whether; but C．if; since D．because; until 31．Our team won’t win the match ________ every member works together. A．when B．unless C．as D．although 32．Lucy, what about going camping if it ________ tomorrow? A．didn’t rain B．doesn’t rain C．won’t rain D．rains 33．Don’t make a promise easily ________ you are sure you can follow it. A．after B．though C．if D．unless 34．You will never know how great you are ________ you try your best. A．since B．though C．unless D．because 35．We can’t finish the work ______ some people come to help us. A．because B．unless C．when D．if 36．You’ll miss the beginning of the movie, ________ you can reach the cinema before eight. A．unless B．though C．because D．since 37．Lisa usually goes bike riding on Saturday ______ it is rainy. A．while B．unless C．until D．if 38．—Look at what you have done! —Sorry, but if I ________ another chance, I can do it better. A．give B．will give C．am given D．will be given 39．—Too much work has made me tired these days, Mrs Li. —I know. But a small tree won’t grow into a big one ________ it experiences lots of winds and rains. A．though B．unless C．since D．if 40．—________ some extra money is found, the library will be closed. —Don’t worry. The government is giving a hand. A．Unless B．Since C．While D．Although 41．What a hot day! Food will go bad quickly ________ we put it into the fridge. A．before B．although C．while D．unless 42．If our government ________ attention to the food safety now, our health ________ in danger. A．won’t pay; is B．doesn’t pay; is C．won’t pay; will be D．doesn’t pay; will be 43．________ you’ve watched it, you can’t imagine how fun the film Zootopia is. A．Because B．If C．When D．Unless 44．________ you practice every day, you will make a great progress. A．Although B．Unless C．If D．Since 45．Keep moving! I believe you’ll surely realize your dream ________ you give it up halfway. A．unless B．if C．since D．though 46．We won’t attack _______ we are attacked. If we are attacked, we will certainly attack back. A．unless B．because C．though D．when 47．She will finish the project in time ________ the workshop is not available. A．unless B．if C．or D．after 48．I won’t go to the party unless I ________ to go. A．invite B．am invited C．will be invited D．invited 49．They won’t go hiking ________ the weather is fine. A．although B．if C．unless D．as long as 50．—Labor education is an important course for students’ self-development. —Exactly. ________ schools put it into practice, students will learn a lot. A．While B．Unless C．If D．Until 51．The doctor will give him the right medicine ______ they find out the cause of the illness. A．if B．before C．until D．unless 52．You won’t fully understand the movie ________ you watch it from the very beginning to the end. A．because B．unless C．as long as D．as soon as 53．—Learning a new language is like learning to swim. —Yes. ________ we try our best, we’ll find it easy. A．Although B．Unless C．Before D．If 54．As we live in a rapidly developing world, we will be left behind ________ we keep learning. A．if B．because C．when D．unless 55．—Could I go to the amusement park with you next Sunday? —No, you can’t, ________ you have a ticket. I have only one ticket. A．if B．unless C．although D．but 56．—Look! Steve fell off the stairs. —Stop! Don’t move him ________ you know how to deal with it. A．because B．until C．unless D．so 57．—I’m afraid I can’t solve the problem ________ the teacher helps me. —Don’t worry. It’s really difficult. A．if B．because C．unless D．while 58．The nurse won’t leave her patients ________ she’s sure they’re all taken good care of. A．if B．because C．when D．unless 59．You will succeed in the end ________ you give up halfway. A．because B．although C．unless D．if 60．Jane will certainly come ________ she is ill. A．unless B．if C．because D．until 61．You will succeed in the end ________ you give up halfway. A．because B．although C．if D．unless 62．—May I enter the laboratory? —No, it’s only open to teachers and students ________ you own a school ID card. A．since B．unless C．until D．if 63．We shouldn’t buy wildlife products. Because the killing won’t end ________ the buying stops. A．but B．though C．unless D．since 64．We ________ up with more ideas if the teacher gives us more time in class. A．come B．came C．will come D．have come 65．We can make each tiny wish come true _________ we work hard. A．even though B．as long as C．so that D．as soon as 66．—Be quick, Bert! You won’t reach the Jiaodong Metro Line 8 Station before 8:00 a.m. ________ you set off earlier. —OK. Mom, I’ll go now. A．until B．before C．unless D．because 67．—Millie, don’t tell them what has happened. —OK, I won’t do that ________ you say I can. A．if B．since C．while D．unless 68．Sophia’s dream won’t come true ________ she keeps trying her best. A．unless B．whether C．when D．because 69．All the passengers will stay at the airport for another day if the snow storm ________ tomorrow. A．doesn’t stop B．didn’t stop C．won’t stop D．hasn’t stopped 70．Students are not supposed to enter the teacher’s office ________. A．unless they are allowed to B．if they want to ask questions C．when they are asked to come in D．though they need some help 71．You won’t see the whole city clearly ________ you reach the top of the hill. A．as B．though C．if D．unless 72．—Do you think we can get to the airport on time? —Yes, ________ the car breaks down. A．unless B．if C．though D．until 73．Living in a fast-developing world, we will fall behind ________ we keep learning. A．though B．since C．after D．unless 74．You’ll do much better ________ you’re more careful with your spelling. A．if B．until C．unless D．though 75．We will have to put off the sports meeting ________ the weather improves. A．unless B．if C．when D．because 76．Joan says she won’t buy a car ________ she passes the driving test. A．unless B．because C．since D．if 77．I will never leave my cat ________ I make sure she is taken good care of. A．unless B．since C．if D．though 78．You should report your trip to the school ________ you travel outside the city. A．unless B．until C．if D．while 79．Give plants water. The crops won’t grow very well ________ it rains soon. A．unless B．if C．because D．although 80．If you don’t go to Linda’s birthday party, ________ I. A．so do B．neither shall C．so will D．neither do 81．Teenagers will learn more from real life ________ they have more chances to experience it. A．although B．before C．if D．until 82．Success _________ if you keep working hard towards your goals . A．achieve B．will achieve C．can be achieved D．was achieved 83．If you __________ your classmates, they will tell you what homework to do. A．are calling B．call C．called D．will call 84．Vivian will take her daughter to the amusement park________she gets the tickets． A．if B．until C．although D．unless 85．According to the traffic rule, we mustn’t ride a bike ________ we wear a helmet (头盔) . A．if B．when C．unless D．because 86．________ the police have new evidence to prove the young man is guilty, he will be set free soon. A．Because B．Unless C．Until D．Since 87．I will forget this, ________ I write it down in my notebook. A．though B．unless C．until D．because 88．The greenhouse effect won’t be reduced ________ less carbon dioxide is released. A．although B．because C．when D．unless 89．The young man keeps visiting his grandparents regularly ________ he is too busy. A．unless B．because C．when D．if 90．You aren’t allowed to use the emergency exit ________ there is a fire. A．when B．because C．if D．unless 91．We will see a film in the open air this coming Sunday ________ it rains. A．unless B．though C．until D．because 92．You may take the books away at a time ________ you give them all back on time. A．now that B．so that C．as soon as D．as long as 93．ChatGPT can finish many different tasks ________ you “chat” with it. A．if B．unless C．before D．but 94．—It is impossible to finish the difficult task in such a short time ________ both of us work hard on it. —No problem.Let’s start! A．if B．but C．because D．unless 95．The kids are taught to stay calm and go out of the building one by one ________ there is a fire. A．until B．because C．if D．although 96．Your education will be incomplete ________ you have practical life skills. A．if B．although C．because D．unless 97．Sorry sir, your order ________ if you fail to pay for it in 15 minutes. A．canceled B．is canceled C．was canceled D．will be canceled 98．We will make few mistakes ________ we are careful enough. A．so that B．as soon as C．as long as D．even if 99．Life on the Earth will become uneasy _________ population growth is under control. A．although B．because C．unless D．when 100．Unless you avoid charging your cellphone all the time, the battery inside it ________ easily. A．damages B．is damaged C．will damage D．will be damaged 2 同步新教材，周周有练习，月月有重点！ 7 同步新教材，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$ 2024-2025学年一线教师制作精品新课系列资料，已编校！ 2024-2025学年一线教师制作精品新课系列资料，已编校！ Unit5 The human brain 重点语法：条件状语从句进阶练100题 语法知识精讲 常用连接词：if, unless, as/so long as，on condition that等。 1.unless = if not Let's go out for a walk unless you are too tired. =If you are not too tired, let's go out for a walk. 2.主将从现原则 As long as you feed him, he will be cooperative. 3.祈使句+and/or/otherwise +一般将来时 If you use your head, you’ll find a way. =Use your head and you’ll find a way. 语法知识精练 1．Computers can do different jobs ______ we give them different programs. A．if B．although C．before D．so that 【答案】A 【详解】句意：如果我们给计算机不同的程序，它们可以做不同的工作。 考查连词辨析。if如果；although尽管；before在……之前；so that以便。“we give them different programs”是计算机可以做不同的工作的条件，用if引导条件状语从句。故选A。 2．If Rose the interview next week, she will have the chance to work for the school studio. A．pass B．will pass C．passes D．passed 【答案】C 【详解】句意：如果露丝下周通过面试，她将有机会为学校广播站工作。 考查动词时态。根据“if”可知此句为条件状语从句，遵循主将从现原则，因此从句应用一般现在时，Rose为第三人称单数。故选C。 3．________ kids have smartphones, they may get calls from strangers and get cheated. A．If B．Until C．Though D．Unless 【答案】A 【详解】句意：如果孩子们有智能手机，他们可能会接到陌生人的电话，被骗。 考查连词辨析。if如果；until直到；though尽管；unless除非。根据“kids have smartphones”是“they may get calls from strangers and get cheated”的肯定条件，用if引导条件状语从句，故选A。 4．_________ you obey the rules, you will be punished. A．If B．Since C．Unless D．Until 【答案】C 【详解】句意：除非你遵守规则，否则你将受到惩罚。 考查从属连词。if如果；since因为；unless除非；until直到。结合语境和“you will be punished.”可知，这里是指除非遵守规则，不然会受到惩罚。故选C。 5．You won’t have a better view of the village ________ you reach the top of the hill. A．because B．unless C．when D．if 【答案】B 【详解】句意：除非你到达山顶，否则你看不到村庄更好的景色。 考查连词。because因为；unless除非；when当……时候；if如果。根据前后句意可知，此处应用unless引导条件状语从句，即“除非到达山顶，否则不会看到更好的景色”。故选B。 6．In summer, food will go bad quickly ________ we put it into a fridge(冰箱). A．if B．unless C．as soon as D．after 【答案】B 【详解】句意：在夏天，除非我们把食物放进冰箱里，否则很快就会变质。 考查条件状语从句。if如果；unless除非；as soon as 一……就……；after之后。根据“food will go bad quickly...we put it into a fridge”可知，指的是除非把食物放进冰箱，否则就会变质。“... we put it into a fridge(冰箱)”是“food will go bad quickly”的否定条件，用unless引导条件状语从句。故选B。 7．I ________ angry if my daughter ________ the truth. A．am; will tell B．won’t be; told C．will be; tell D．won’t be; tells 【答案】D 【详解】句意：如果女儿说实话，我不会生气。 考查条件状语从句。根据“I…angry if my daughter…the truth.”可知，句子是条件状语从句，应该遵循“主将从现”原则，从句用一般现在时，主句用一般将来时，因此排除AB选项；从句中主语是“my daughter”，因此谓语动词应用单数形式，加s，因此排除C选项。故选D。 8．You ________ your friends better if you can stand in their shoes. A．will understand B．understood C．are understanding D．have understood 【答案】A 【详解】句意：如果你能站在朋友的立场上，你就能更好地理解他们。 考查动词时态。if引导的条件状语从句，遵循“主将从现”原则，主句用一般将来时：will do。故选A。 9．You will fail the test ________ you study hard. A．if B．unless C．though D．because 【答案】B 【详解】句意：除非你努力学习，否则你会考试不及格。 考查从属连词辨析。if如果；unless除非；though尽管；because因为。根据句意可知，如果不努力学习，那么就没法通过考试，因此后者不发生是前者发生的条件，unless“除非，如果不”，符合语境。故选B。 10．You won’t attend the meeting on time ________ you don’t hurry. A．before B．though C．until D．if 【答案】D 【详解】句意：如果你不快点，你就不能准时参加会议了。 考查连词辨析。before在……以前；though尽管；until直到；if如果。根据“You won’t attend the meeting on time ... you don’t hurry.”可知，后一句是前一句的条件，故应用if引导条件状语从句。故选D。 11．—What fine weather! Why not row boats on Fengcheng Lake together? —Sure, if your homework ________ by noon. A．finishes B．is finished C．has finished D．will be finished 【答案】B 【详解】句意：——多好的天气！为什么不一起在凤城湖划船呢？——当然，如果你的家庭作业在中午之前完成的话。 考查一般现在时的被动语态。根据“if your homework...by noon”可知，此处是if引导的条件状语从句，此处省略了主句，主句应表示他们将会去划船，属于一般将来时，因此从句采用一般现在时，主语homework和动词finish之间是被动关系，所以空格处用一般现在时的被动语态，结构是：am/is/are+动词过去分词，主语homework是不可数名词，be动词用is，finish变成过去分词finished。故选B。 12．You mustn’t drive a car on the road ________ you get a driver’s license. A．unless B．if C．since D．although 【答案】A 【详解】句意：除非你有驾照，否则你不能在路上开车。 考查从属连词辨析。unless除非；if如果；since自从；although虽然。“you get a driver’s license”是“You mustn’t drive a car on the road”的否定条件，用unless引导条件状语从句。故选A。 13．—You needn’t take an umbrella with you unless it ________ tomorrow. —Yes, you are right. A．is raining B．will rain C．rains D．rained 【答案】C 【详解】句意：——你不必带伞，除非明天下雨。——是的，你是对的。 考查动词时态。根据“You needn’t take an umbrella with you unless it ... tomorrow”可知，此处是unless引导的条件状语从句，主句含有情态动词needn’t，从句用一般现在时，主语是it，动词用三单rains。故选C。 14．According to the law, we can’t share others’ personal information ________ they say it’s okay. A．if B．unless C．when D．since 【答案】B 【详解】句意：根据法律规定，我们不能分享他人的个人信息，除非他们同意。 考查连词辨析。if 如果；unless除非，如果不；when当……时候；since自从，既然。根据“we can’t share others’ personal information… they say it’s okay.”可知，后句表示否定条件，前句表示在否定条件下的结果。故选B。 15．I don’t know ________ or not he will come here. ________ he comes here tomorrow, I will call you. A．whether, Whether B．if, If C．if, Whether D．whether, If 【答案】D 【详解】句意：我不知道他是否会来这里。如果他明天来了，我会打你电话。 考查连词。whether是否；if如果/是否。根据“or not”可知第一空应用whether，whether…or not为固定搭配，表示“是否”。“he comes here tomorrow”是“I will call you”的肯定条件，所以用if引导条件状语从句。故选D。 16．If I _________ the driving test tomorrow, I will have another try. A．will fail B．am failing C．failed D．fail 【答案】D 【详解】句意：如果我明天的驾驶考试不及格，我将再试一次。 考查动词时态。if引导条件状语从句，遵循“主将从现”原则，所以从句应用一般现在时，故选D。 17．—It’s hard for Tina to succeed in losing weight. —Yeah. ________ she eats less and exercises every day. A．Unless B．After C．If D．Since 【答案】A 【详解】句意：——蒂娜很难成功减肥。——是的。除非她每天少吃多锻炼。 考查连词辨析。Unless除非；After在……以后；If如果；Since因为。根据“she eats less and exercises every day”及语境可知，应是除非每天少吃多锻炼，否则很难减肥成功，故选A。 18．The motorbike is _________ old that it can’t be used any more _________ some of its parts are changed. A．so; if B．such; if C．so; unless D．such; unless 【答案】C 【详解】句意：这辆摩托车太旧了，除非更换一些零件，否则就不能再使用了。 考查状语从句连接词。so+adj./adv that...如此……以致……；such+n. that...如此……以致……；if如果；unless除非。第一空，根据形容词“old”，可知此处需使用so；第二空，根据“...it can’t be used any more...some of its parts are changed.”可知此处是表达“除非更换一些零件，否则就不能再使用了”。故选C。 19．I don’t know if Jim ________ hiking this afternoon. If he ________, I’ll tell you. A．goes; goes B．will go; goes C．goes; will go D．will go; will go 【答案】B 【详解】句意：我不知道吉姆今天下午是否会去远足。如果他去了，我会告诉你的。 考查动词时态。第一句if引导宾语从句，主句是一般现在时，从句时态不限制。根据“this afternoon”可知，应用一般将来时，排除AC；第二句if引导条件状语从句，遵循主将从现原则，从句用一般现在时，故选B。 20．You’ll never know the truth ________ you go out and look for it yourself. A．if B．though C．unless D．since 【答案】C 【详解】句意：除非你自己出去寻找，否则你永远不会知道真相。 考查连词词义辨析。if如果；though虽然；unless除非；since自从。结合句意可知，“不知道真相”的否定条件是“自己出去寻找”，所以用unless引导条件状语从句。故选C。 21．I always sleep with the window open ________ it is really cold. A．unless B．if C．because D．or 【答案】A 【详解】句意：除非真的很冷，否则我总是开着窗户睡觉。 考查连词辨析。unless除非；if如果；because因为；or否则。分析句子结构可知，句子“it is really cold”是“I always sleep with the window open”的否定条件，表示除非天气很冷，否则就会开着窗户睡觉，应用unless引导条件状语从句。故选A。 22．—Paul, do you know if Sam________ to Jenny’s birthday party this Sunday? —I think he will come if he________. A．comes; will invite B．will come; will be invited C．comes; invites D．will come; is invited 【答案】D 【详解】句意：——保罗，你知道山姆这个星期天是否会来珍妮的生日聚会吗？——我想如果他受到邀请，他会来的。 考查动词时态和被动语态。根据“do you know if Sam ... to Jenny’s birthday party this Sunday”可知，此句是if引导的宾语从句，由时间状语“this Sunday”可知，时态用一般将来时will do；根据“he will come if he...”可知，此处是if引导的条件状语从句，根据“主将从现”原则，从句用一般现在时，主语he是第三人称单数，与invite是被动关系，故用一般现在时的被动语态is done。故选D。 23．—Will you go to Lisa’s party next Sunday? —Well, if I ______, I will go on time. A．invite B．will invite C．am invited D．will be invited 【答案】C 【详解】句意：——下星期天你去参加丽萨的派对吗？——如果我被邀请了，我会准时去。 考查时态和语态。根据“if I..., I will go on time.”可知，此句为if引导的条件状语从句，遵循“主将从现”原则，从句应用一般现在时，主语I和invite之间是被动关系，结构为be+过去分词。故选C。 24．I won’t go to the movies this evening ________ I’m free. A．or B．unless C．because D．than 【答案】B 【详解】句意：除非我有空，否则我今晚不会去看电影。 考查连词辨析。or或者；unless除非；because因为；than与其说，而不是。根据“I won’t go to the movies this evening…I’m free.”可知除非我有空，否则我今晚不会去看电影。故选B。 25．—________ some extra money is found, the library will close. —Don’t worry. The government is giving a hand. A．Unless B．Although C．Since D．While 【答案】A 【详解】句意：——除非找到一些额外的钱，否则图书馆将关闭。——别担心。政府正在伸出援手。 考查连词辨析。unless除非；although尽管；since因为；while当……时候。分析句子和语境可知，“ some extra money is found”是“the library will close”的否定条件，所以空处用unless引导条件状语从句，故选A。 26．You won’t fully understand the value of literature ________ you read it for yourself. A．because B．unless C．if D．whenever 【答案】B 【详解】句意：除非你自己读，否则你不会完全理解文学的价值。 考查连词。because因为；unless除非；if如果；whenever无论何时。根据句子“You won’t fully understand the value of literature...you read it for yourself”可知，此处表达的是“除非你自己读了，否则你不会明白文学的价值”，因此此处关系连词应为“unless除非”。故选B。 27．As we live in a rapidly developing world, we will be left behind ________ we keep learning. A．unless B．although C．if D．until 【答案】A 【详解】句意：我们生活在一个快速发展的世界，除非我们不断学习，否则我们将被落在后面。 考查连词。unless除非；although虽然；if如果；until直到。根据“we will be left behind…we keep learning.”可知是指除非我们不断学习，否则我们将被落在后面。故选A。 28．You won’t achieve your dream ________ you stick to your goal for a long run. A．though B．if C．unless D．after 【答案】C 【详解】句意：除非你长期坚持你的目标，否则你不会实现你的梦想。 考查连词辨析。though尽管；if如果；unless除非；after在……之后。根据“You won’t achieve your dream ... you stick to your goal for a long run.”可知，你不会实现梦想，除非你能长期坚持你的目标，用unless引导条件状语从句。故选C。 29．Nobody can hear you _______ you speak in a louder voice. A．when B．if C．unless D．after 【答案】C 【详解】句意：除非你说话的声音大一点，否则没人能听见。 考查连词辨析。when当……时；if如果；unless除非；after在……以后。根据“you speak in a louder voice.”可知，应说“除非”你说话的声音大一点，否则没人能听到。故选C。 30．—Would you like to play football with me ________ it doesn’t rain tomorrow? —Sure, ________ I am busy. A．if; unless B．whether; but C．if; since D．because; until 【答案】A 【详解】句意：——如果明天不下雨，你愿意和我一起踢足球吗？——当然，除非我很忙。 考查连词辨析。if如果；unless除非；whether是否；but但是；since因为；because因为；until直到。根据“Would you like to play football with me...it doesn’t rain tomorrow?”可知，第一空指如果不下雨，应使用if引导条件状语从句；根据“Sure,...I am busy.”可知。第二空指当然会去，除非自己很忙，应使用unless“除非”。故选A。 31．Our team won’t win the match ________ every member works together. A．when B．unless C．as D．although 【答案】B 【详解】句意：除非每个队员齐心协力，否则我们队赢不了这场比赛。 考查连词辨析。when当……时候；unless除非，如果不；as当……时候；although尽管。根据“every member works together.”可知，每个成员都齐心协力是赢得比赛的条件，应该用unless引导条件状语从句。故选B。 32．Lucy, what about going camping if it ________ tomorrow? A．didn’t rain B．doesn’t rain C．won’t rain D．rains 【答案】B 【详解】句意：露西，如果明天不下雨，我们去露营怎么样？ 考查动词时态。if引导的条件状语从句，遵循“主将从现”原则，从句用一般现在时，排除AC选项；再结合语境可知，明天不下雨就去露营。故选B。 33．Don’t make a promise easily ________ you are sure you can follow it. A．after B．though C．if D．unless 【答案】D 【详解】句意：不要轻易许下承诺，除非你确信你能做到。 考查条件状语从句。after在……之后；though尽管；if如果；unless如果不，除非。根据“you are sure you can follow it”可知，此处指“除非”你确信能做到。故选D。 34．You will never know how great you are ________ you try your best. A．since B．though C．unless D．because 【答案】C 【详解】句意：除非你尽力，否则你永远不会知道自己有多优秀。 考查从属连词词义辨析。since自从；though尽管；unless除非；because因为。根据“You will never know how great you are”和“you try your best”可知，是指除非你尽力，否则你永远不会知道自己有多优秀，故选C。 35．We can’t finish the work ______ some people come to help us. A．because B．unless C．when D．if 【答案】B 【详解】句意：除非一些人来帮助我们，否则我们无法完成这项工作。 考查连词辨析。because因为；unless除非；when当；if如果。分析两个句子可知，后句是前句的否定条件，用unless引导条件状语从句。故选B。 36．You’ll miss the beginning of the movie, ________ you can reach the cinema before eight. A．unless B．though C．because D．since 【答案】A 【详解】句意：除非你能在八点前到达电影院，否则你会错过电影的开头。 考查连词辨析。unless除非；though尽管；because因为；since自从。根据“You’ll miss the beginning of the movie, ... you can reach the cinema before eight.”可知，“你能在八点前到达电影院”是“你会错过电影的开头”的否定条件，用unless“除非；如果不”来引导条件状语从句。故选A。 37．Lisa usually goes bike riding on Saturday ______ it is rainy. A．while B．unless C．until D．if 【答案】B 【详解】句意：除非下雨，丽莎通常在星期六骑自行车。 考查连词辨析。while在……期间；unless除非；until直到；if如果。根据“it is rainy”可知，下雨丽莎就不骑车了。此处表示不骑车的条件，应用unless连接。故选B。 38．—Look at what you have done! —Sorry, but if I ________ another chance, I can do it better. A．give B．will give C．am given D．will be given 【答案】C 【详解】句意：——看看你做了什么！——对不起，但是如果再给我一次机会，我会做得更好。 考查被动语态和时态。根据分析句子可知，本句主语是I，谓语动词是give，主谓之间是被动关系，应用被动语态，并且本句是if引导的条件状语从句，主句为含有情态动词，从句用一般现在时。故选C。 39．—Too much work has made me tired these days, Mrs Li. —I know. But a small tree won’t grow into a big one ________ it experiences lots of winds and rains. A．though B．unless C．since D．if 【答案】B 【详解】句意：——李太太，这些天太多的工作让我很累。——我知道。但是，一棵小树不会长成一棵大树，除非它经历了很多风雨。 考查连词辨析。though虽然；unless除非；since自从；if如果。分析句子可知，后句是前句的否定条件，用unless引导条件状语从句。故选B。 40．—________ some extra money is found, the library will be closed. —Don’t worry. The government is giving a hand. A．Unless B．Since C．While D．Although 【答案】A 【详解】——除非找到一些额外的钱，否则图书馆将关闭。——别担心。政府正在伸出援手。 考查连词辨析。unless除非；although尽管；since因为；while当……时候。分析句子和语境可知，“some extra money is found”是“the library will close”的否定条件，所以空处用unless引导条件状语从句，故选A。 41．What a hot day! Food will go bad quickly ________ we put it into the fridge. A．before B．although C．while D．unless 【答案】D 【详解】句意：真热的一天呀！食物将很快变质，除非我们把它放在冰箱。 考查连词辨析。before在……之前；although尽管；while当……时候；unless除非。根据“we put it into the fridge.”可知空后表示否定的条件，用unless引导条件状语从句。故选D。 42．If our government ________ attention to the food safety now, our health ________ in danger. A．won’t pay; is B．doesn’t pay; is C．won’t pay; will be D．doesn’t pay; will be 【答案】D 【详解】句意：如果我们的政府现在不重视食品安全，我们的健康将处于危险之中。 考查动词时态。if引导的条件状语从句，遵循主将从现原则，从句用一般现在时，主句用一般将来时“will do”，故选D。 43．________ you’ve watched it, you can’t imagine how fun the film Zootopia is. A．Because B．If C．When D．Unless 【答案】D 【详解】句意：除非你已经看过，否则你无法想象电影《疯狂动物城》多么有趣。 考查连词辨析。Because因为；If如果；When当……时候；Unless除非。根据“you’ve watched it”可知空后表示否定的条件，用unless引导条件状语从句。故选D。 44．________ you practice every day, you will make a great progress. A．Although B．Unless C．If D．Since 【答案】C 【详解】句意：如果你每天都练习，你会有很大的进步。 考查连词辨析。although虽然；unless除非；if如果；since自从。前句是后句是肯定条件，用if引导条件状语从句。故选C。 45．Keep moving! I believe you’ll surely realize your dream ________ you give it up halfway. A．unless B．if C．since D．though 【答案】A 【详解】句意：继续前进！我相信你一定会实现你的梦想，除非你中途放弃。 考查条件状语从句。unless除非；if如果；since自从；though尽管。根据“I believe you’ll surely realize your dream...you give it up halfway.”可知，中途放弃是实现梦想的否定条件，应用unless引导条件状语从句。故选A。 46．We won’t attack _______ we are attacked. If we are attacked, we will certainly attack back. A．unless B．because C．though D．when 【答案】A 【详解】句意：除非受到攻击，否则我们不会攻击。如果我们受到攻击，我们一定会反击。 考查从属连词词义辨析。unlss除非；because因为；though尽管；when当……时候。根据“If we are attacked, we will certainly attack back.”可知，这里指除非受到攻击，否则我们不会攻击，故选A。 47．She will finish the project in time ________ the workshop is not available. A．unless B．if C．or D．after 【答案】A 【详解】句意：除非这个工作室不能用，否则她会按时完成这个项目。 考查连词。unless除非；if如果；or或者，否则；after在……之后。unless引导的是条件状语从句，除非工作室不能用，是不能完成工作的条件。故选A。 48．I won’t go to the party unless I ________ to go. A．invite B．am invited C．will be invited D．invited 【答案】B 【详解】句意：除非邀请我去，否则我不会去参加聚会。 考查动词时态及语态。此处为unless引导的条件状语从句，遵循“主将从现”原则，主句是一般将来时，故从句是一般现在时；“我”被邀请参加聚会，应为被动语态，结构为am/is/are done。故选B。 49．They won’t go hiking ________ the weather is fine. A．although B．if C．unless D．as long as 【答案】C 【详解】句意：除非天气好，否则他们不会去远足。 考查从属连词词义辩词。although尽管；if如果；unless除非；as long as只要。分析可知，此处是指如果天气不好，他们就不会远足，unless等于if ... not，所以应该用unless表示“除非”。故选C。 50．—Labor education is an important course for students’ self-development. —Exactly. ________ schools put it into practice, students will learn a lot. A．While B．Unless C．If D．Until 【答案】C 【详解】句意：——劳动教育是学生自我发展的重要课程。——确实是。如果学校把它付诸实践，学生们会学到很多东西。 考查连词辨析。while当；unless除非；if如果；until直到。分析句子可知，前句是后句的肯定条件，用if引导条件状语从句。故选C。 51．The doctor will give him the right medicine ______ they find out the cause of the illness. A．if B．before C．until D．unless 【答案】A 【详解】句意：如果医生查出了病因，就会给他开正确的药。 考查连词辨析。if如果；before在……之前；until直到；unless除非。“they find out the cause of the illness”是开正确的药的肯定条件，用if引导条件状语从句。故选A。 52．You won’t fully understand the movie ________ you watch it from the very beginning to the end. A．because B．unless C．as long as D．as soon as 【答案】B 【详解】句意：除非你从头到尾看完，否则你不会完全理解这部电影。 考查连词辨析。because因为；unless除非；as long as只要；as soon as一……就……。根据“You won’t fully understand the movie ... you watch it from the very beginning to the end.”可知，你不会完全理解这部电影的内涵，除非你把它从头看到尾，用unless引导条件状语从句。故选B。 53．—Learning a new language is like learning to swim. —Yes. ________ we try our best, we’ll find it easy. A．Although B．Unless C．Before D．If 【答案】D 【详解】句意：——学习一门新语言就像学习游泳一样。——是的。如果我们尽最大努力，我们会发现这很容易。 考查连词辨析。Although尽管；Unless除非；Before在……以前；If如果。分析句子可知，“we try our best”是“we’ll find it easy.”的肯定条件，需用if引导条件状语从句。故选D。 54．As we live in a rapidly developing world, we will be left behind ________ we keep learning. A．if B．because C．when D．unless 【答案】D 【详解】句意：由于我们生活在一个快速发展的世界，除非我们不断学习，否则我们将被甩在后面。 考查从属连词辨析。if如果；because因为；when当……时；unless除非。根据“we keep learning”是“we will be left behind”的否定条件，用unless引导条件状语从句。故选D。 55．—Could I go to the amusement park with you next Sunday? —No, you can’t, ________ you have a ticket. I have only one ticket. A．if B．unless C．although D．but 【答案】B 【详解】句意：——下星期天我能和你一起去游乐园吗？——不，你不能，除非你有票。我只有一张票。 考查连词辨析。if如果；unless除非；although虽然；but但是。“you have a ticket”是“No, you can’t”的否定条件，用unless引导条件状语从句。故选B。 56．—Look! Steve fell off the stairs. —Stop! Don’t move him ________ you know how to deal with it. A．because B．until C．unless D．so 【答案】C 【详解】句意：——看！史蒂夫跌下台阶了。——停！不要移动他，除非你知道如何处理它。 考查连词。because因为；until直到；unless除非；so所以。根据“Don’t move him ... you know how to deal with it.”可知，此处应当是条件状语从句，用unless引导。故选C。 57．—I’m afraid I can’t solve the problem ________ the teacher helps me. —Don’t worry. It’s really difficult. A．if B．because C．unless D．while 【答案】C 【详解】句意：——除非老师帮助我，否则我恐怕解决不了这个问题。 ——不要担心。这真的很难。 考查连词辨析。if如果；because因为；unless除非；while然而。分析句子结构可知，“the teacher helps me”是“I can’t solve the problem”的否定条件，应用unless引导条件状语从句。故选C。 58．The nurse won’t leave her patients ________ she’s sure they’re all taken good care of. A．if B．because C．when D．unless 【答案】D 【详解】句意：护士不会离开她的病人，除非她确定他们都得到了很好的照顾。 考查连词辨析。if如果；because因为；when在……时候；unless除非。空后“she’s sure they’re all taken good care of”是空前“The nurse won’t leave her patients”的否定条件，表示“除非确定病人得到了很好的照料，否则她不会离开”，所以空处用unless引导条件状语从句，故选D。 59．You will succeed in the end ________ you give up halfway. A．because B．although C．unless D．if 【答案】C 【详解】句意：你最终会成功的，除非你中途放弃。 考查连词辨析。because因为；although虽然；unless除非；if如果。根据“you give up halfway.”可知，你最终会成功的，“除非”你中途放弃，后句是前句的否定条件，所以用unless引导条件状语从句，故选C。 60．Jane will certainly come ________ she is ill. A．unless B．if C．because D．until 【答案】A 【详解】句意：简一定会来的，除非她病了。 考查连词辨析。unless除非；if如果；because因为；until直到。分析句子可知，后句是前句的否定条件，用unless引导条件状语从句。故选A。 61．You will succeed in the end ________ you give up halfway. A．because B．although C．if D．unless 【答案】D 【详解】句意：你最终会成功的，除非你半途而废。 考查连词辨析。because因为；although尽管；if如果；unless除非。“你半途而废”是“你最终会成功”的否定条件，用unless引导条件状语从句。故选D。 62．—May I enter the laboratory? —No, it’s only open to teachers and students ________ you own a school ID card. A．since B．unless C．until D．if 【答案】B 【详解】句意：——我可以进实验室吗？——不，它只对老师和学生开放，除非你有学生证。 考查连词辨析。since自从；unless除非，如果不；until直到；if如果。根据“you own a school ID card”可知，此句是前一句的否定条件，如果没有学生证的话，就不能进入实验室，unless符合题意。故选B。 63．We shouldn’t buy wildlife products. Because the killing won’t end ________ the buying stops. A．but B．though C．unless D．since 【答案】C 【详解】句意：我们不应该购买野生动物产品。因为除非停止购买，否则杀戮就不会结束。 考查连词辨析。but但是；though虽然，尽管；unless除非，如果不；since既然，因为。根据“the killing won’t end”和“the buying stops”可知，除非停止购买，否则杀戮不会结束，应用unless引导条件状语从句。故选C。 64．We ________ up with more ideas if the teacher gives us more time in class. A．come B．came C．will come D．have come 【答案】C 【详解】句意：如果老师给我们更多的上课时间，我们会想出更多的主意。 考查时态。根据“We... up with more ideas if the teacher gives us more time in class”可知，考查if引导的条件状语从句，其遵循 “主将从现”原则。从句“gives”为一般现在时，故主句用一般将来时。故选C。 65．We can make each tiny wish come true _________ we work hard. A．even though B．as long as C．so that D．as soon as 【答案】B 【详解】句意：只要我们努力，每个微小的愿望都能实现。 考查连词辨析。even though尽管；as long as只要；so that以便；as soon as一……就。“我们努力”是“每个微小的愿望都能实现”的条件，用as long as引导条件状语从句。故选B。 66．—Be quick, Bert! You won’t reach the Jiaodong Metro Line 8 Station before 8:00 a.m. ________ you set off earlier. —OK. Mom, I’ll go now. A．until B．before C．unless D．because 【答案】C 【详解】句意：——快点，伯特！除非你早点出发，否则上午8点前你到不了胶东地铁8号线站。——好的，妈妈，我现在就去。 考查连词辨析。until直到；before在……以前；unless除非；because因为。根据前半句“You won’t reach the Jiaodong Metro Line 8 Station before 8:00 a.m.”和后半句“you set off earlier”可知，这里要填“除非”这一含义，表示否定的条件。故选C。 67．—Millie, don’t tell them what has happened. —OK, I won’t do that ________ you say I can. A．if B．since C．while D．unless 【答案】D 【详解】句意：——米莉，别告诉他们发生了什么事。——好吧，除非你说我可以，否则我不会那么做。 考查连词辨析。if如果；since自从……以来；while当……时候；unless除非。根据“don’t tell them what has happened.”可知，要求保密，“you say I can”是不会告诉别人的否定条件，后句“我不告诉别人”表示结果；用unless引导条件状语从句。故选D。 68．Sophia’s dream won’t come true ________ she keeps trying her best. A．unless B．whether C．when D．because 【答案】A 【详解】句意：除非她继续努力，否则索菲亚不会实现她的梦想。 考查连词辨析。unless除非……，引导条件状语从句；whether是否，引导宾语从句；when当……时候，引导时间状语从句；because因为，引导原因状语从句。根据“Sophia’s dream won’t come true…she keeps trying her best.”可知，空格内的连词引导的是一个否定意义的条件状语从句。故选A。 69．All the passengers will stay at the airport for another day if the snow storm ________ tomorrow. A．doesn’t stop B．didn’t stop C．won’t stop D．hasn’t stopped 【答案】A 【详解】句意：如果明天暴风雪不停止，所有的乘客将在机场再待一天。 考查if引导的条件状语从句。根据分析句子可知，此处是一个if引导的条件状语从句，遵循“主将从现”的原则，即主句时态是一般将来时，从句时态要用一般现在时，主语是the snow storm，所以谓语动词要用单数形式，结合句意和选项可知，此处应该表达否定，并且stop是实义动词，所以借助助动词does的否定形式doesn’t，后跟动词原形，来表达否定。故选A。 70．Students are not supposed to enter the teacher’s office ________. A．unless they are allowed to B．if they want to ask questions C．when they are asked to come in D．though they need some help 【答案】A 【详解】句意：学生不应该进入老师的办公室，除非他们被允许。 考查条件状语从句。根据“Students are not supposed to enter the teacher’s office”可知，学生们不应该进老师办公室，可推测除非被允许。故选A。 71．You won’t see the whole city clearly ________ you reach the top of the hill. A．as B．though C．if D．unless 【答案】D 【详解】句意；除非你到达山顶，否则你看不清整个城市。 考查连词辨析。as因为；though虽然；if如果；unless除非。分析句子可知，后句是前句的否定条件，用unless引导条件状语从句。故选D。 72．—Do you think we can get to the airport on time? —Yes, ________ the car breaks down. A．unless B．if C．though D．until 【答案】A 【详解】句意：——你认为我们可以准时到达机场吗？——是的。除非汽车抛锚。 考查连词辨析。unless除非；if如果；though尽管；until直到。根据“the car breaks down.”可知此处是否定的条件，表示除非汽车抛锚，否则会准时到达机场，故选A。 73．Living in a fast-developing world, we will fall behind ________ we keep learning. A．though B．since C．after D．unless 【答案】D 【详解】句意：生活在一个快速发展的世界里，除非我们不断学习，否则我们将落后。 考查连词。though虽然；since自从；after在……以后；unless除非。根据“we will fall behind…we keep learning.”可知是指除非我们不断学习，否则我们将落后。故选D。 74．You’ll do much better ________ you’re more careful with your spelling. A．if B．until C．unless D．though 【答案】A 【详解】句意：如果你拼写更仔细，你会做得更好。 考查连词词义辨析。if如果；until直到……为止；unless除非；though尽管。分析可知，“you’re more careful with your spelling.”是“You’ll do much better”的条件，所以用if引导条件状语从句。故选A。 75．We will have to put off the sports meeting ________ the weather improves. A．unless B．if C．when D．because 【答案】A 【详解】句意：除非天气好转，否则我们将不得不推迟运动会。 考查连词。unless除非；if如果；when当……时候；because因为。结合句意，我们将推迟运动会，是在天气没有好转的情况下，因此用unless引导的条件状语，故选A。 76．Joan says she won’t buy a car ________ she passes the driving test. A．unless B．because C．since D．if 【答案】A 【详解】句意：Joan说除非她通过驾照考试，否则她不会买车。 考查连词辨析。unless除非，引导条件状语从句，相当于“if…not”；because因为，引导原因状语从句；since自从，引导时间状语从句；if如果，引导条件状语从句。分析句子关系可知，“she passes the driving test”是“she won’t buy a car”的否定条件，因此用“unless”。故选A。 77．I will never leave my cat ________ I make sure she is taken good care of. A．unless B．since C．if D．though 【答案】A 【详解】句意：我永远不会离开我的猫，除非我能确保她得到很好的照顾。 考查连词。unless除非，如果不；since因为；if 如果；though虽然。根据横线前后句子之间的关系可知，空前句子是空后句子假设的结果，且表示否定“如果不，除非”，所以用unless引导条件状语从句。故选A。 78．You should report your trip to the school ________ you travel outside the city. A．unless B．until C．if D．while 【答案】C 【详解】句意：如果你在城外旅行，你应该向学校报告你的行程。 考查从属连词辨析。unless除非；until直到；if如果；while在……期间。根据“you travel outside the city”可知，如果你出城，就应该向学校报告你的行程，应用if来引导条件状语从句。故选C。 79．Give plants water. The crops won’t grow very well ________ it rains soon. A．unless B．if C．because D．although 【答案】A 【详解】句意：给植物浇水。除非马上下雨，否则庄稼长得不好。 考查连词辨析。unless除非；if如果；because因为；although虽然。“it rains soon”是“The crops won’t grow very well”的否定条件，用unless引导条件状语从句，故选A。 80．If you don’t go to Linda’s birthday party, ________ I. A．so do B．neither shall C．so will D．neither do 【答案】B 【详解】句意：如果你不去参加琳达的生日聚会，我也不会去。 考查倒装句和条件状语从句。根据句子结构，从句表否定，故主句应用否定表达，即“neither +助动词+主语”结构，且条件状语从句中，如果从句是一般现在时，那么主句的时态要用一般将来时。选项B中的shall符合这一结构和时态要求。故选B。 81．Teenagers will learn more from real life ________ they have more chances to experience it. A．although B．before C．if D．until 【答案】C 【详解】句意：青少年将从现实生活中学到更多，如果他们有更多的机会去体验它。 考查从属连词辨析。although尽管；before在……之前；if如果；until直到……为止。根据“Teenagers will learn more from real life ... they have more chances to experience it.”可知，后句是前句的条件，用if引导条件状语从句，故选C。 82．Success _________ if you keep working hard towards your goals . A．achieve B．will achieve C．can be achieved D．was achieved 【答案】C 【详解】句意：如果你继续朝着你的目标不断努力，成功是可以实现的。 考查含有情态动词的被动语态。句子的主语success与动词“achieve”之间是被动关系，所以要用被动语态；if引导条件状语从句，时态遵循“主将从现”原则，如果主句中含有情态动词时，从句通常用一般现在时，所以此处使用含有情态动词的被动语态（can be done）。故选C。 83．If you __________ your classmates, they will tell you what homework to do. A．are calling B．call C．called D．will call 【答案】B 【详解】句意：如果你打电话给你的同学，他们会告诉你做什么作业。 考查主将从现。分析句子可知，句子是If引导的条件状语从句，主句用一般将来时，从句用一般现在时，从句中主语是you，谓语动词用动词原形call。故选B。 84．Vivian will take her daughter to the amusement park________she gets the tickets． A．if B．until C．although D．unless 【答案】A 【详解】句意：如果薇薇安买到票，她将带女儿去游乐园． 考查连词词义辨析。if如果；until直到……为止；although虽然，尽管，即使；unless除非。根据句意"___薇薇安买到票，她将带女儿去游乐园。"可知，此处用连词if引导条件状语从句。故选A。 【点睛】做题时，在明确各选项含义的基础上，结合具体语境，即可得出答案。 85．According to the traffic rule, we mustn’t ride a bike ________ we wear a helmet (头盔) . A．if B．when C．unless D．because 【答案】C 【详解】句意：根据交通规则，我们不戴头盔就不能骑自行车。 考查连词辨析。if如果；when当；unless除非；because因为。分析句子可知，后句是前句的否定条件，用unless引导条件状语从句。故选C。 86．________ the police have new evidence to prove the young man is guilty, he will be set free soon. A．Because B．Unless C．Until D．Since 【答案】B 【详解】句意：除非警方有新证据证明年轻人有罪，否则他很快会被释放。 考查从属连词辨析。because因为；unless除非；until直到；since因为，自从。根据“... the police have new evidence to prove the young man is guilty, he will be set free soon.”可知警方找到新证据是条件，用unless引导条件状语从句。故选B。 87．I will forget this, ________ I write it down in my notebook. A．though B．unless C．until D．because 【答案】B 【详解】句意： 我会忘记这件事，除非我把它记在我的笔记本里。 考查连词辨析。though尽管；unless除非，如果不；until直到；because因为。根据“I will forget this...I write it down in my notebook.”可知如果不记在笔记本里，就会忘记，后句是前句的否定条件，应用unless引导条件状语从句，故选B。 88．The greenhouse effect won’t be reduced ________ less carbon dioxide is released. A．although B．because C．when D．unless 【答案】D 【详解】句意：温室效应不会减少，除非释放更少的二氧化碳。 考查连词辨析。altough尽管；because因为；when当……时候；unless除非。根据“The greenhouse effect won’t be reduced”和“less carbon dioxide is released”之间的关系可知，只有释放更多的二氧化碳，温室效应才会减少。因此此处需由unless引导条件状语从句。故选D。 89．The young man keeps visiting his grandparents regularly ________ he is too busy. A．unless B．because C．when D．if 【答案】A 【详解】句意：这个年轻男人一直定期探望他的祖父母除非他太忙了。 考查连词。unless除非；because因为；when当……时候；if如果。根据“The young man keeps visiting his grandparents regularly”可知有定期探望外祖父母的习惯，所以是除非太忙，应该用unless引导条件状语从句，故选A。 90．You aren’t allowed to use the emergency exit ________ there is a fire. A．when B．because C．if D．unless 【答案】D 【详解】句意：除非发生火灾，否则你不允许使用紧急出口。 考查连词辨析。when当……时；because因为；if如果；unless除非。“there is a fire”是“You aren’t allowed to use the emergency exit”的否定条件，用unless引导条件状语从句。故选D。 91．We will see a film in the open air this coming Sunday ________ it rains. A．unless B．though C．until D．because 【答案】A 【详解】句意：除非下雨，否则这个星期天我们将在户外看电影。 考查连词辨析。unless除非，引导条件状语从句；though虽然，引导让步状语从句；until直到，引导时间状语从句；because因为，引导原因状语从句。分析句子结构可知，此处是条件状语从句，空处表示“除非”。故选A。 92．You may take the books away at a time ________ you give them all back on time. A．now that B．so that C．as soon as D．as long as 【答案】D 【详解】句意：只要你按时还书，你可以一次把书拿走。 考查连词辨析。now that既然；so that以便；as soon as一……就；as long as只要。“you give them all back on time”是“You may take the books away at a time”的条件，用as long as引导条件状语从句。故选D。 93．ChatGPT can finish many different tasks ________ you “chat” with it. A．if B．unless C．before D．but 【答案】A 【详解】句意：如果你与ChatGPT“聊天”，它可以完成许多不同的任务。 考查连词辨析。if如果；unless除非；before在……之前；but但是。根据根据“ChatGPT can finish many different tasks...you ‘chat’ with it.”可知后句是前句的肯定条件，应用if引导条件状语从句，故选A。 94．—It is impossible to finish the difficult task in such a short time ________ both of us work hard on it. —No problem.Let’s start! A．if B．but C．because D．unless 【答案】D 【详解】句意：——除非我们双方都努力，否则不可能在这么短的时间内完成这项艰巨的任务。——没问题。我们开始吧！ 考查连词词义辨析。if如果；but但是；because因为；unless除非。根据下文“No problem. Let’s start!”并结合“It is impossible to finish the difficult task in such a short time...both of us work hard on it.”可知，此处表示“除非我们双方都努力，否则不可能在这么短的时间内完成这项艰巨的任务”，因此unless符合题意。故选D。 95．The kids are taught to stay calm and go out of the building one by one ________ there is a fire. A．until B．because C．if D．although 【答案】C 【详解】句意：孩子们被教导要保持冷静，如果发生火灾，要一个接一个地走出大楼。 考查连词辨析。until直到……才；because因为；if如果；although虽然。根据“The kids are taught to stay calm and go out of the building one by one”可知这是一种假设情况，因此用if引导条件状语从句。故选C。 96．Your education will be incomplete ________ you have practical life skills. A．if B．although C．because D．unless 【答案】D 【详解】句意：除非你有实际的生活技能，否则你的教育是不完整的。 考查连词词义辨析。if如果，引导条件状语从句；although虽然，尽管，引导让步状语从句；because因为，引导原因状语从句；unless除非，如果不，引导条件状语从句。根据句意可知，“受教育完整”的条件是“有实际的生活技能”，if和unless引导条件状语从句。当某个条件为真时，后面的动作或结果会发生，用if引导条件状语从句。当某个条件不成立时，后面的动作或结果才会发生，用unless引导条件状语从句。unless在意义上相当于“if...not...”，选项D符合语境。故选D。 97．Sorry sir, your order ________ if you fail to pay for it in 15 minutes. A．canceled B．is canceled C．was canceled D．will be canceled 【答案】D 【详解】句意：对不起，先生，如果您在15分钟内不付款，您的订单将被取消。 考查条件状语从句和被动语态。根据“if you fail to…”可知，此句属于含if引导的条件状语从句的复合句，遵循主将从现原则，从句谓语“fail to pay for…”为一般现在时，则主句应用一般将来时；主句主语your order与动词cancel逻辑上存在动宾关系，应用被动语态，所以此处应用一般将来时的被动语态，其结构是will be done。故选D。 98．We will make few mistakes ________ we are careful enough. A．so that B．as soon as C．as long as D．even if 【答案】C 【详解】句意：只要我们足够细心，我们就会少犯错误。 考查连词辨析。so that以便，表目的；as soon as一……就，表时间；as long as只要，表条件；even if尽管，表让步。根据题干“We will make few mistakes…we are careful enough”，可知细心是少犯错误的条件，结合选项，需用as long as引导条件状语从句。故选C。 99．Life on the Earth will become uneasy _________ population growth is under control. A．although B．because C．unless D．when 【答案】C 【详解】句意：除非人口增长得到控制，否则地球上的生活将变得不安。 考查连词辨析。although虽然；because因为；unless除非；when当……时。“population growth is under control”是“Life on the Earth will become uneasy”的否定条件，用unless引导条件状语从句，故选C。 100．Unless you avoid charging your cellphone all the time, the battery inside it ________ easily. A．damages B．is damaged C．will damage D．will be damaged 【答案】D 【详解】句意：除非你一直避免给手机充电，否则手机内的电池很容易损坏。 考查一般将来时的被动语态。此题是由unless引导条件状语从句，如果主句是将来时或表示将来含义时，从句要用一般现在时。此题的主句的主语the battery与动词damage之间是被动关系，因此应该用被动语态，这里的主语用一般将来时，故此处是一般将来时的被动语态。故选D。 2 同步新教材，周周有练习，月月有重点！ 7 同步新教材，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$