Unit 5【刷语法】原因状语从句（重点语法提升练）-2026-2027学年九年级英语上册单元模块满分必刷题（新教材译林版）

**基本信息** 聚焦原因状语从句专项突破，通过引导词用法系统归纳与梯度训练，构建“概念辨析-语境应用”的完整语法学习链。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |原因状语从句语法讲练|40道单选+5道完成句子|系统归纳because/since/as/for的语气强弱、使用场景及位置差异，强调“because和so不可并用”等易错点|从引导词概念辨析到语境应用，形成“概念-原理-实践”的完整逻辑链，提升语言运用精准度与思维辨析能力|

2026-2027学年九年级英语上册单元模块满分必刷题（新教材译林版） Unit 5 Music speaks【刷语法】(重点语法提升练) 原因状语从句 原因状语从句的引导词有because, since, as, for, 等。 1. because意为“因为”,表示动作发生的直接原因，语气很强。它引导的原因状语从句可以位于主句之前，也可位于主句之后。如果从句在前，从句与主句之间要用逗号隔开。because 可用来回答why引导的疑 问句。 Because it was raining, we had to stay at home.因为下雨，我们只好待在家里。 注意：because和so不能同时使用。 如：He didn’t come to school yesterday because he was ill. 他昨天没来上学，因为他生病了。 2. since引导原因状语从句表示显然的或已为人知的理由，表示“因为，既然” 如：since everyone is here, let’s start.既然大家都到期了，我们就开始吧。 3 .as引导的原因状语从句 as意为“因为;由于”,和since的用法大体相同，表示附带说明的双方已知的原因，其引导的原因状语从句通常位于句首。 As you were out, I left a message.因为你不在，所以我留了一张字条儿。 As it is raining, you'd better take a taxi.因为在下雨，你最好乘出租车。 4. for引导的原因状语从句，for意为“因为，由于”,比because正式,语气比because弱，一般不用于回答why引导的问题，可用于正式或文学性的书面语中。for引导的原因状语从句位于主句之后。 如：He must start planning now, for the future may bring unexpected changes.他必须现在就开始计划，因为未来可能会有无法预料的变化。 语法精练语法精讲 过关测试满分：50分 时间：40分钟 一、单项选择（每小题1分，共40分） 一、单项选择 1．He didn’t go to school yesterday ________ he was ill in bed. A．and B．so C．because D．or 2．—I’m a little worried about the maths test tomorrow. —________ you have studied hard, you will do just fine. A．Unless B．Before C．Since D．Though 3．I am very happy ________ I have made a difference to someone else’s life. A．unless B．because C．until D．though 4．________ many students showed interest in the robot club, the school decided to open more classes. A．Unless B．Though C．Because D．Until 5．More and more people choose green travel ________ it can reduce air pollution. A．but B．or C．until D．because 6．We’d better get to school earlier ________ it’s our School Sports Day. A．and B．so C．though D．because 7．________ Hefei’s drone industry develops fast, it has won wide attention across China. A．Although B．Because C．While D．Unless 8．—Yes, Mr Smith, everybody is here. —________ everybody is here, let’s begin our class. A．Because B．Whether C．When D．Since 9．________ we are running out of time, I suggest taking a taxi to go there. A．Unless B．As C．Though 10．—Why do you keep on reading traditional culture books? —I do it ________ I want to know more about local Anhui customs. A．so that B．because C．though D．once 11．— It is said that Changzhou Damagao is famous and delicious. — ________ we are here, why not try some? A．Since B．Unless C．Although D．Whenever 12．Talking to pets can help you let go of problems ________ you give them your full attention. A．unless B．as C．as if D．even though 13．—Why won’t the machine work? —________ its parts are broken. A．As B．Since C．Because D．For 14．________ time is limited, we’ll finish our imagination sharing in ten minutes. A．Though B．Since C．After D．If 15．He cried ________ he failed the exam. A．because B．because of C．for D．with 16．Emma exercises a lot every afternoon, ________ she will have a P.E. test next month. A．or B．for C．but D．so 17．She was very angry, ________ the kids made a mess in the bathroom. A．so B．for C．though D．or 18．Museums are becoming more popular ________ people want to learn more about culture and history. A．as B．unless C．until D．although 19．We asked Wang Hao to lead us to the Nanchang Museum ________ he said he knew the way. A．as B．until C．unless D．though 20．Museums are becoming more popular ______ people want to learn more about culture and history. A．until B．unless C．as D．although 21．Nowadays museums are becoming more popular ________ people want to learn more about culture and history. A．until B．unless C．as D．although 22．— The road up to the top of the mountain is still closed till the snow weather is over. — It’s necessary, ________ it’s dangerous to go up the mountain in the snowy weather. A．if B．whether C．as D．although 23．— Mike is my best friend, but he always copies my homework. What should I do? — ________ he’s your best friend, you should tell him that copying others’ homework is wrong. A．Since B．Until C．When D．Or 24．________ you have finished your homework, you can go out to relax for a while. A．Unless B．Since C．Though D．Until 25．________ the disease is still spreading rapidly, wearing a mask is quite necessary. A．Before B．Since C．Although D．Unless 26．He didn’t go to school ________ he was ill. A．because B．so C．but 27．Celina didn’t buy the dictionary yesterday ________ her aunt would give her one. A．until B．because C．if D．before 28．Many young people return to their hometown ________ they want to stay with their families and build their hometown. A．so B．but C．because 29．I walked slowly ________ I wanted to watch more lovely plants. A．but B．because C．although 30．Alice can’t reach the key on the table ________ she’s too small. A．whether B．and C．but D．because 31．—I want to join the art club, but I’m worried about my study. —________ you love painting so much, why not try balancing both? Art can also help you relax. A．Because B．Although C．Since D．Unless 32．—Let’s share these useful materials with each other. —Good idea. ________ we are friends, we can learn from each other. A．As B．Unless C．Though 33．Zhaxi didn’t go to school yesterday ________ he was ill. A．because B．because of C．if D．so 34．David has been more confident ________ he has made great progress in cooking. A．though B．since C．if 35．I can’t play basketball with you ________ I have to look after my younger sister at home. A．unless B．until C．because D．although 36．— It’s said that Yangzhou Fried Rice is very famous and delicious. — Well, ________ we’re here, why not go to the restaurant and order some? A．unless B．since C．until D．though 37．Let’s get started! ________ our group members are all free this Saturday, shall we have a discussion? A．Though B．While C．Since D．Unless 38．—Mother’s Day is coming. Shall we make a big dinner for Mum? —Good idea! But please give me some guidance (指导), ________ I don’t know how to cook. A．though B．but C．as D．while 39．In Beijing, some 24-hour libraries are very popular with people ________ they are open all the time and in good places with big spaces and other good things. A．even if B．unless C．as D．or 40．Let’s go home, ________ it is late. A．so B．and C．as D．but 二、完成句子（每小题2分，共10分） 41．许多人喜欢它，因为它展现了 16 世纪意大利的生活风貌。 Many people enjoy it ________ it shows what life ________ ________ in 16th-century Italy. 42．昨天晚上他没有看电影，那是因为他不得不帮助他的妹妹做作业。 He did not see the film last night. ________ ________ ________ he had to help his little sister with her homework. 43．由于他身体欠佳，我决定独自去那里。 __________ he was not feeling well, I ___________ __________ go there alone. 44．既然都到了，让我们开始吧。 __________ __________ is here, let’s begin. 45．既然没有人看到，我拒绝相信你。 ________ nobody saw it, I ________ ________ ________ you. 学科网（北京）股份有限公司 $ 2026-2027学年九年级英语上册单元模块满分必刷题（新教材译林版） Unit 5 Music speaks【刷语法】(重点语法提升练) 原因状语从句 原因状语从句的引导词有because, since, as, for, 等。 1. because意为“因为”,表示动作发生的直接原因，语气很强。它引导的原因状语从句可以位于主句之前，也可位于主句之后。如果从句在前，从句与主句之间要用逗号隔开。because 可用来回答why引导的疑 问句。 Because it was raining, we had to stay at home.因为下雨，我们只好待在家里。 注意：because和so不能同时使用。 如：He didn’t come to school yesterday because he was ill. 他昨天没来上学，因为他生病了。 2. since引导原因状语从句表示显然的或已为人知的理由，表示“因为，既然” 如：since everyone is here, let’s start.既然大家都到期了，我们就开始吧。 3 .as引导的原因状语从句 as意为“因为;由于”,和since的用法大体相同，表示附带说明的双方已知的原因，其引导的原因状语从句通常位于句首。 As you were out, I left a message.因为你不在，所以我留了一张字条儿。 As it is raining, you'd better take a taxi.因为在下雨，你最好乘出租车。 4. for引导的原因状语从句，for意为“因为，由于”,比because正式,语气比because弱，一般不用于回答why引导的问题，可用于正式或文学性的书面语中。for引导的原因状语从句位于主句之后。 如：He must start planning now, for the future may bring unexpected changes.他必须现在就开始计划，因为未来可能会有无法预料的变化。 语法精练语法精讲 过关测试满分：50分 时间：40分钟 一、单项选择（每小题1分，共40分） 一、单项选择 1．He didn’t go to school yesterday ________ he was ill in bed. A．and B．so C．because D．or 【答案】C 【详解】句意：他昨天没去上学，因为他卧病在床。 and和；so所以；because因为；or或者。根据句意，前后句是因果关系，“he was ill in bed”是“He didn't go to school”的原因，因此用表示原因的连词because。应填because。 2．—I’m a little worried about the maths test tomorrow. —________ you have studied hard, you will do just fine. A．Unless B．Before C．Since D．Though 【答案】C 【详解】句意：——我有点担心明天的数学考试。——既然你已经努力学习，你一定会考好的。 Unless除非；Before在……之前；Since既然/因为；Though虽然。根据“you have studied hard”和“you will do just fine”可知，前者是后者的理由，需用Since引导原因状语从句。 3．I am very happy ________ I have made a difference to someone else’s life. A．unless B．because C．until D．though 【答案】B 【详解】句意：我很开心，因为我对别人的生活产生了影响。 unless除非；because因为；until直到；though虽然。根据“I am very happy”与“I have made a difference to someone else’s life”之间的逻辑关系可知，后者是前者开心的原因，应使用表示原因的连词because引导原因状语从句。 4．________ many students showed interest in the robot club, the school decided to open more classes. A．Unless B．Though C．Because D．Until 【答案】C 【详解】句意：因为许多学生对机器人俱乐部表现出兴趣，学校决定开设更多的课程。 Unless除非；Though虽然；Because因为；Until直到。根据句意可知，前半句“学生表现出兴趣”是后半句“学校决定开课”的原因，前后句构成因果关系，应用Because引导。 5．More and more people choose green travel ________ it can reduce air pollution. A．but B．or C．until D．because 【答案】D 【详解】句意：越来越多的人选择绿色出行，因为它可以减少空气污染。 but但是；or或者；until直到；because因为。根据“it can reduce air pollution”可知，减少空气污染是选择绿色出行的原因，前后句是因果关系，应用because引导原因状语从句。 6．We’d better get to school earlier ________ it’s our School Sports Day. A．and B．so C．though D．because 【答案】D 【详解】句意：我们最好早点到学校，因为今天是我们的学校运动会。 and和，并且；so所以；though虽然；because因为。根据“We’d better get to school earlier”和“it’s our School Sports Day”可知，后者是前者早点到校的原因，应使用because引导原因状语从句。 7．________ Hefei’s drone industry develops fast, it has won wide attention across China. A．Although B．Because C．While D．Unless 【答案】B 【详解】句意：因为合肥的无人机产业发展迅速，它在全国范围内赢得了广泛关注。 Although虽然；Because因为；While然而/当……时；Unless除非。根据题干“develops fast”与“has won wide attention”可知，发展快是赢得关注的原因，应用Because引导原因状语从句，应填Because。 8．—Yes, Mr Smith, everybody is here. —________ everybody is here, let’s begin our class. A．Because B．Whether C．When D．Since 【答案】D 【详解】句意：——是的，史密斯先生，大家都到了。——既然大家都到了，让我们开始上课吧。 Because因为；Whether是否；When当……时候；Since既然。根据上文“Yes, Mr Smith, everybody is here.”可知，人员到齐是既定事实，此处表示基于已知事实提出建议，Since符合语境，意为“既然”。 9．________ we are running out of time, I suggest taking a taxi to go there. A．Unless B．As C．Though 【答案】B 【详解】句意：因为我们时间不多了，我建议乘出租车去那里。 Unless除非；As因为；Though虽然。根据“________ we are running out of time, I suggest taking a taxi to go there.”可知，时间紧迫是建议打车的原因，前后句构成因果关系，应用As引导原因状语从句。 10．—Why do you keep on reading traditional culture books? —I do it ________ I want to know more about local Anhui customs. A．so that B．because C．though D．once 【答案】B 【详解】句意：——你为什么坚持读传统文化书籍？——因为我想了解更多安徽本土民俗。 so that为了；because因为；though虽然；once一旦。根据答语中“I want to know more about local Anhui customs”可知，这正是坚持阅读传统文化书籍的原因，回答原因用because。 11．— It is said that Changzhou Damagao is famous and delicious. — ________ we are here, why not try some? A．Since B．Unless C．Although D．Whenever 【答案】A 【详解】句意：——据说常州大麻糕很有名且美味。——既然我们在这里，为什么不尝尝呢？ Since既然；由于；Unless除非；Although虽然；Whenever无论何时。句中“why not try some?”是提出建议，结合“we are here”，说明此处表示“既然我们在这儿”，表示原因或理由，since语境。 12．Talking to pets can help you let go of problems ________ you give them your full attention. A．unless B．as C．as if D．even though 【答案】B 【详解】句意：和宠物聊天能帮助你放下烦恼，因为你把全部注意力都放在了这件事上。 unless除非；as因为；as if似乎；even though尽管。根据“Talking to pets can help you let go of problems ... you give them your full attention”可知，空格后是前文描述情况成立的原因，应填as。 13．—Why won’t the machine work? —________ its parts are broken. A．As B．Since C．Because D．For 【答案】C 【详解】句意：——为什么机器不工作？——因为它的零件坏了。 As引导原因状语从句时，语气较弱，多用于已知的、显而易见的原因，不直接回答why问句；Since语气比as稍强，但同样侧重“既然”，用于双方都知道的原因，不直接回答why问句；Because专门用来回答why引导的问句，语气最强，直接说明原因；For是并列连词，引导的分句通常放在主句后，补充说明理由，不能单独放在句首回答why问句。问句“Why won’t the machine work?”是在询问直接原因，要用Because回答。 14．________ time is limited, we’ll finish our imagination sharing in ten minutes. A．Though B．Since C．After D．If 【答案】B 【详解】句意：既然时间有限，我们将在十分钟内完成我们的想象力分享。 Though表让步，虽然/尽管；Since表已知原因，既然；After表时间先后，在……之后；If表条件，如果。根据句意“时间有限”是已知前提，应填Since。 15．He cried ________ he failed the exam. A．because B．because of C．for D．with 【答案】A 【详解】句意：他哭了，因为他考试不及格。 because因为；because of因为；for因为；with和、带有。结合句子结构可知，空格后为完整主谓句子，需用连词because引导原因状语从句；because of后接名词短语；for表原因前面加逗号，不能直接放在主句后解释直接原因；with不表原因，不符合语境。 16．Emma exercises a lot every afternoon, ________ she will have a P.E. test next month. A．or B．for C．but D．so 【答案】B 【详解】句意：艾玛每天下午都做很多运动，因为她下个月有个体育测试。 考查连词辨析。or或者，表选择；for因为，表原因；but但是，表转折；so所以，表结果。根据句意可知，艾玛每天下午都做很多运动是因为她下个月有个体育测试，所以此处应该用for表示原因。故选B。 17．She was very angry, ________ the kids made a mess in the bathroom. A．so B．for C．though D．or 【答案】B 【详解】句意：她非常生气，因为孩子们把浴室弄得一团糟。 考查连词辨析。so所以；for因为；though虽然；or或者。根据“She was very angry…the kids made a mess in the bathroom.”可知，前后句是因果关系，后句说明了原因，因此空格处需填入表示原因的连词，for符合语境。故选B。 18．Museums are becoming more popular ________ people want to learn more about culture and history. A．as B．unless C．until D．although 【答案】A 【详解】句意：博物馆越来越受欢迎，因为人们想了解更多的文化和历史。 as因为；unless除非；until直到；although尽管。根据“Museums are becoming more popular”和“people want to learn more about culture and history”可知，前后句为因果关系，应填as。 19．We asked Wang Hao to lead us to the Nanchang Museum ________ he said he knew the way. A．as B．until C．unless D．though 【答案】A 【详解】句意：我们请王浩带我们去南昌博物馆，因为他说他知道路。 考查连词辨析。as因为；until直到……为止；unless除非；though尽管。根据语境可知，“he said he knew the way”是“我们请王浩带我们去南昌博物馆”的原因，所以应该用连词as来引导原因状语从句。故选A。 20．Museums are becoming more popular ______ people want to learn more about culture and history. A．until B．unless C．as D．although 【答案】C 【详解】句意：博物馆正变得越来越受欢迎，因为人们想更多地了解文化和历史。 考查连词辨析。until直到；unless除非；as因为；although虽然。分析句子可知，“people want to learn more about culture and history”是“Museums are becoming more popular”的原因，as有“因为”的意思，引导原因状语从句，符合语境。故选C。 21．Nowadays museums are becoming more popular ________ people want to learn more about culture and history. A．until B．unless C．as D．although 【答案】C 【详解】句意：如今，博物馆变得越来越受欢迎，因为人们想了解更多的文化和历史。 考查连词辨析。until直到；unless除非；as因为；although虽然。根据“people want to learn more about culture and history.”可知，设空处后解释了原因，as符合语境。故选C。 22．— The road up to the top of the mountain is still closed till the snow weather is over. — It’s necessary, ________ it’s dangerous to go up the mountain in the snowy weather. A．if B．whether C．as D．although 【答案】C 【详解】句意：——通往山顶的道路仍然关闭，直到下雪天气结束。——这是必要的，因为下雪天上山很危险。 考查连词辨析。if如果；whether是否；as因为；although虽然。横线前“It’s necessary”是对上面对话的肯定，即下雪天关闭上山的路是很有必要的，横线后所述“it’s dangerous to go up the mountain in the snowy weather.”是关闭道路的原因，因为雪天上山很危险。故选C。 23．— Mike is my best friend, but he always copies my homework. What should I do? — ________ he’s your best friend, you should tell him that copying others’ homework is wrong. A．Since B．Until C．When D．Or 【答案】A 【详解】句意：——迈克是我最好的朋友，但他总是抄我的作业，我该怎么办？——既然他是你最好的朋友，你应该告诉他抄别人的作业是不对的。 Since既然/因为；Until直到；When当……时候；Or或者/否则。根据语境，前后句存在因果关系，前半句是原因，后半句是建议，“since”可用于引导原因状语从句，符合语境。 24．________ you have finished your homework, you can go out to relax for a while. A．Unless B．Since C．Though D．Until 【答案】B 【详解】句意：既然你已经完成了作业，你可以出去放松一会儿。 Unless除非；Since既然；Though虽然；Until直到。根据“you have finished your homework, you can go out to relax for a while.”可知，前后句是因果关系，表示“既然”完成了作业，就可以出去放松，应填Since。 25．________ the disease is still spreading rapidly, wearing a mask is quite necessary. A．Before B．Since C．Although D．Unless 【答案】B 【详解】句意：由于疾病仍在迅速传播，戴口罩是非常必要的。 Before在……之前；Since既然，由于；Although虽然；Unless除非。根据“the disease is still spreading rapidly”与“wearing a mask is quite necessary”可知，前后句构成因果关系，因为疾病传播迅速，所以戴口罩很有必要，应填Since。 26．He didn’t go to school ________ he was ill. A．because B．so C．but 【答案】A 【详解】句意：他没有去上学因为他病了。 because因为；so所以；but但是。根据句子逻辑，后半句“他病了”是前半句“没有去上学”的原因，因此应选用表示原因的连词because。 27．Celina didn’t buy the dictionary yesterday ________ her aunt would give her one. A．until B．because C．if D．before 【答案】B 【详解】句意：Celina昨天没有买那本字典，因为她姑姑将给她一本。 until直到……为止；because因为；if如果；before在……之前。“her aunt would give her one”是“Celina didn’t buy the dictionary yesterday”的原因，because后接原因，引导原因状语从句。 28．Many young people return to their hometown ________ they want to stay with their families and build their hometown. A．so B．but C．because 【答案】C 【详解】句意：许多年轻人回到他们的家乡，因为他们想和家人待在一起并建设他们的家乡。 so所以；but但是；because因为。根据“they want to stay with their families and build their hometown”可知，后半句解释了年轻人回家乡的原因，前后句是因果关系。应填because。 29．I walked slowly ________ I wanted to watch more lovely plants. A．but B．because C．although 【答案】B 【详解】句意：我走得很慢，因为我想要看更多可爱的植物。 but但是；because因为；although虽然。根据“I walked slowly”与“I wanted to watch more lovely plants”可知，后句是前句动作发生的原因，前后句构成因果关系，应用because引导。 30．Alice can’t reach the key on the table ________ she’s too small. A．whether B．and C．but D．because 【答案】D 【详解】句意：爱丽丝够不着桌子上的钥匙，因为她太小了。 whether是否；and和；but但是；because因为。根据“Alice can’t reach the key on the table”与“she’s too small”可知，前后句是因果关系，后句是前句的原因，应用because引导原因状语从句。故填because。 31．—I want to join the art club, but I’m worried about my study. —________ you love painting so much, why not try balancing both? Art can also help you relax. A．Because B．Although C．Since D．Unless 【答案】C 【详解】句意：——我想加入艺术俱乐部，但我担心我的学习。——既然你如此热爱绘画，为什么不尝试平衡两者呢？艺术也能帮助你放松。 Because因为；Although虽然；Since既然/因为；Unless除非。根据前句“you love painting so much”是既定事实，后句提出建议，表示“既然”热爱绘画，可以尝试平衡，应用Since引导原因状语从句，表示明显的理由，应填Since。 32．—Let’s share these useful materials with each other. —Good idea. ________ we are friends, we can learn from each other. A．As B．Unless C．Though 【答案】A 【详解】句意：——让我们彼此分享这些有用的资料吧。——好主意。因为我们是朋友，我们可以互相学习。 As因为；Unless除非；Though虽然。根据“Good idea.”可知说话人同意分享资料，后半句“we are friends”是“we can learn from each other”的原因，前后构成因果关系。应填As，引导原因状语从句。 33．Zhaxi didn’t go to school yesterday ________ he was ill. A．because B．because of C．if D．so 【答案】A 【详解】句意：扎西昨天没去上学，因为他生病了。 because因为；because of因为；if如果；so所以。根据“he was ill”是一个完整的句子，可知此处需要用连词because引导原因状语从句。because of后接名词或代词等；if引导条件状语从句；so表示结果关系。故选because。 34．David has been more confident ________ he has made great progress in cooking. A．though B．since C．if 【答案】B 【详解】句意：大卫变得更加自信了，因为他在烹饪方面取得了巨大进步。 though虽然；since因为；if 如果。根据“David has been more confident”与“he has made great progress”可知，取得进步是变得自信的原因，前后构成因果关系，since符合句意。 35．I can’t play basketball with you ________ I have to look after my younger sister at home. A．unless B．until C．because D．although 【答案】C 【详解】句意：我不能和你一起打篮球，因为我必须在家照顾我的妹妹。 unless除非；until直到；because因为；although虽然。根据“I have to look after my younger sister at home”可知，这是不能打篮球的原因，前后句构成因果关系，应用because引导原因状语从句。 36．— It’s said that Yangzhou Fried Rice is very famous and delicious. — Well, ________ we’re here, why not go to the restaurant and order some? A．unless B．since C．until D．though 【答案】B 【详解】句意：——据说扬州炒饭非常有名且美味。——嗯，既然我们在这儿，为什么不去餐厅点一些呢？ unless除非；since既然；until直到；though尽管。根据“we’re here, why not go to the restaurant and order some?”可知，后半句是基于前半句“我们在这儿”这一事实提出的建议，前后构成因果关系，应用since引导原因状语从句。 37．Let’s get started! ________ our group members are all free this Saturday, shall we have a discussion? A．Though B．While C．Since D．Unless 【答案】C 【详解】句意：让我们开始吧！既然我们小组成员本周六都有空，我们进行一次讨论好吗？ Though虽然；While当……时候/然而；Since既然/由于；Unless除非。根据“our group members are all free this Saturday”可知，是提出建议的原因，Since表示“既然”，符合语境。 38．—Mother’s Day is coming. Shall we make a big dinner for Mum? —Good idea! But please give me some guidance (指导), ________ I don’t know how to cook. A．though B．but C．as D．while 【答案】C 【详解】句意：——母亲节快到了。我们为妈妈做一顿丰盛的晚餐好吗？——好主意！但是请给我一些指导，因为我不知道怎样烹饪。 考查连词辨析。though尽管；but但是；as因为；while当……时。“I don’t know how to cook.”是“But please give me some guidance”的原因，用as引导原因状语从句。故选C。 39．In Beijing, some 24-hour libraries are very popular with people ________ they are open all the time and in good places with big spaces and other good things. A．even if B．unless C．as D．or 【答案】C 【详解】句意：在北京，一些24小时开放的图书馆很受人们的欢迎，因为它们一直开放，而且处在有大空间和其他好东西的好地方。 考查连词辨析。even if即使，尽管；unless除非；as因为；or或者。根据“In Beijing, some 24-hour libraries are very popular with people...they are open all the time and in good places with big spaces and other good things.”可知，空格前后句为因果关系，前果后因，故此处应用as引导原因状语从句。故选C。 40．Let’s go home, ________ it is late. A．so B．and C．as D．but 【答案】C 【详解】句意：让我们回家吧，因为时间太晚了。 考查连词辨析。so所以；and并且；as因为；but但是。横线后“it is late”是前文“Let’s go home”的原因，故选C。 二、完成句子（每小题2分，共10分） 41．许多人喜欢它，因为它展现了 16 世纪意大利的生活风貌。 Many people enjoy it ________ it shows what life ________ ________ in 16th-century Italy. 【答案】 because was like 【详解】原句中“因为”和“生活是什么样的”是关键词，对于①处，中文“许多人喜欢它，因为它展现了……”，“因为”对应的英文是“because”，用来引导原因状语从句，所以①处填“because”。 对于②处，句子描述的是16世纪意大利的生活风貌，是过去的情况，“life”是不可数名词，“是”要用过去式“was” ，所以②处填“was”。 对于③处，“what life was like”是常用表达，意为“生活是什么样的”，“like”在这里是介词，意为“像” ，所以③处填“like”。 42．昨天晚上他没有看电影，那是因为他不得不帮助他的妹妹做作业。 He did not see the film last night. ________ ________ ________ he had to help his little sister with her homework. 【答案】 That is because 【详解】根据中英文对应可知，需要翻译“那是因为”，that is“那是”，首字母大写，because“因为”，引导原因状语从句。故填That；is；because。 43．由于他身体欠佳，我决定独自去那里。 __________ he was not feeling well, I ___________ __________ go there alone. 【答案】 As decided to 【详解】as“由于”，引导的原因状语从句，常放在主句之前，说明原因或理由，后面的主句说明结果；decide to do sth. “决定做某事”，固定短语；根据汉语分析句子可知，这是一个由as引导的原因状语从句，由“...he was not feeling well,”可判断主句时态为一般过去时，谓语动词decide要使用过去式decided。故填As；decided；to。 44．既然都到了，让我们开始吧。 __________ __________ is here, let’s begin. 【答案】 Since everybody 【详解】since“既然”，引导原因状语从句，everybody“每个人”，作主语，故填Since；everybody。 45．既然没有人看到，我拒绝相信你。 ________ nobody saw it, I ________ ________ ________ you. 【答案】 Since refused to trust/believe 【详解】对比中英文，英语句中缺少“既然”和“拒绝相信”。第一空为since引导的原因状语从句，表示显然的、已知的理由，since“既然”，位于句首，首字母大写；refuse to do sth“拒绝做某事”，根据第一句中的“saw”，用一般过去时，动词用过去式refused；believe/trust“相信”。故填Since；refused；to；trust/believe。 学科网（北京）股份有限公司 $