Unit 5 Music speaks 语法Grammar 原因状语从句 2026-2027学年九年级英语上册单元练习（新教材译林版）

**基本信息** 聚焦原因状语从句四大引导词（because/for/since/as）的用法辨析，通过概念解析-用法对比-专项训练的逻辑链条构建系统性突破路径，提升语言理解与逻辑判断能力。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |because和for|20题（含why问答/否定转移）|because表直接原因，可回答why；for表补充原因，位于主句后|从“原因表达需求”切入，通过语气强弱（because>for）和功能差异（回答why与否）构建辨析框架| |since和as|20题（含已知事实/建议场景）|since/as表已知理由，语气弱于because，since多位于句首|基于“语境明确度”递进，从“双方已知原因”（as）到“显而易见理由”（since）形成应用梯度|

班级 姓名 学号 分数 Unit 5 Music speaks 原因状语从句 （时间：60分钟，满分：100分） because 和 for 引导的原因状语从句 原因状语从句是指在复合句中表示主句动作发生原因的句子。我们可以用 because 和 for 引导原因状语从句。如： I did not go to school yesterday because I was ill. 我昨天没去上学，因为我生病了。 Because it was raining, we had to stay at home. 因为下雨，我们只好待在家里。 The kids were excited about his arrival, for he would bring them some New Year presents. 孩子们为他的到来而兴奋，因为他将给他们带些新年礼物。 注意：because 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；for 引导的原因状语从句位于主句之后。 ◆ because 意思是“因为”，表示动作发生的直接原因，语气很强，常用来回答 why 引导的疑问句。for 意思是“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。如： —Why didn’t he go with us today? 他为什么今天没跟我们一起去？ —Because he was too tired. 因为他太累了。 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。 ◆ 汉语里我们习惯说“因为……所以……”，但使用英语时不能将 because 与 so 连用。如： Because my bike was broken, I went to school by bus yesterday. ( ✓ ) Because my bike was broken, so I went to school by bus yesterday. ( × ) since 和 as 引导的原因状语从句 我们也可以用 since 和 as 引导原因状语从句。如： Since China’s high-speed railway reaches more and more cities, it’s easier for people to travel around now. 由于中国通高铁的城市越来越多，如今人们出行更方便了。 As you were not there, I left a message. 因为你不在那里，所以我留言了。 注意：和 because 相比，since 和 as 的语气稍弱。 ◆ since 意思是“既然，由于，因为”，表示已知的、显然的理由，较正式，多位于句首。如： Since it is late, I shall go home right now. (由于) 时间不早了，我得马上回家。 ◆ as 和 since 的用法大体相同，表示附带说明的双方已知的原因。如： As it is raining, you’d better take a taxi. 既然在下雨，你最好乘出租车。 单项选择(本大题共40小题，每小题2.5分，共100分) because 和 for 引导的原因状语从句 1．He didn’t pass the math exam ______ he didn’t study hard. He only played games after school. A．so B．because C．but D．and 2．He didn’t go to the concert ______ he didn’t like classical music, not ______ he was busy. A．because; because B．if; because C．because; if D．if; if 3．—Why did you choose to study abroad? —________ I want to experience different educational systems and broaden my horizons. A．Because B．Since C．As D．For 4．—What type of TV programmes do you think is the most educational? —Documentaries, ________ they can offer a lot of knowledge about nature and society. A．because B．if C．unless D．though 5．Miranda loves spring best ________ she enjoys painting outdoors in this season. A．so B．before C．but D．because 6．Everyone wants to make friends with Andy, ________ he is very friendly. A．but B．because C．so D．or 7．There’s no need to take a taxi _______ it’s only five minutes’ walk from here. A．because B．while C．though D．until 8．—Mum, may I have more chocolate? —You’d better not, ________ too much sweet food is bad for health. A．while B．although C．because 9．More teachers are willing to receive AI training ________ AI technology in helping with teaching becomes more and more popular. A．or B．unless C．because D．though 10．The day must be breaking, ________ the birds have begun singing. A．because B．as C．for D．since 11．I can't tell whether she is old or young, ________ I have never seen her. A．but B．for C．or D．so 12．We should save energy, ________ it helps slow down global warming. A．but B．so C．for D．though 13．People should use recyclable bottles, ________ it can help reduce pollution. A．but B．so C．for D．though 14．—Why do you like doing calligraphy? —________ it can make me calm down. A．Because B．So C．But 15．—Why do you love painting? —________ it helps me express my feelings. A．Because B．So C．But 16．She didn’t go to the cinema with us ________ she had to finish her project. A．because B．until C．so that D．wherever 17．We can see many stars clearly at night ________ there is no light pollution here. A．so B．because C．but D．though 18．I read the book Around the World in Eighty Days ________ I like Jules Verne’s novels very much. A．because B．so C．but D．or 19．We should eat more fruit and vegetables ________ they are good for our health. A．so B．because C．but D．or 20．We should face the growing pains bravely, ________ they can make us stronger and better. A．so B．because C．but D．or since 和 as 引导的原因状语从句 21．________ you haven’t met your new workmates before, I’ll introduce you to them at the party. A．While B．So C．But D．Since 22．— Mum, the Maths problem is too difficult for me. —________ you can’t work it out by yourself, why not ask your teacher for help? A．While B．When C．Before D．Since 23．________ the disease is still spreading rapidly, wearing a mask is quite necessary. A．Before B．Unless C．Although D．Since 24．—Do you think kids should help out with chores at home? —________ they live in one house with their parents, they should do their part. A．Unless B．Although C．Since 25．—I feel bored and I have no idea of what to do now. —Well. ________ you are so free, you can help me fold the clothes. A．Although B．Until C．Since D．Unless 26．We have to stay at home ________ the weather is bad. A．as B．so C．but D．than 27．________ I’m very tired, I am going to bed early. A．Until B．As C．Though D．While 28．________ we are running out of time, I suggest taking a taxi to go there. A．Unless B．As C．Though 29．You can’t feed cats any chocolate ________ it’s harmful to them. A．though B．so C．while D．as 30．________ you didn’t answer my call, I left a message on WeChat. A．If B．As C．While D．Before 31．________ the coolest winter is coming in Britain, electronic heating products made in China have become best sellers there last year. A．As B．If C．Though 32．—You recommend me to wear an orange shirt today, right? —Yes. ________ orange can bring you good luck, it is good for your interview. A．As B．When C．If D．While 33．Life is like a one-way race, so treasure every moment ________ time cannot be won again. A．so B．as C．if D．unless 34．________ you know little about this art form, you can find a book to learn. A．Though B．While C．When D．Since 35．—It’s said that Xinyuan mutton tastes delicious. —Well, ________ we are here, why not go to the restaurant and order some? A．though B．unless C．since D．whenever 36．_________ you are free today, could you help me with housework? A．Since B．Though C．Unless D．Until 37．________ you have grown up, you should learn to look after yourselves. A．Since B．Until C．Although D．Unless 38．—It’s said that Zhenjiang Pot Cover Noodles are very delicious. —Well, ________ we are here, why not have a try? A．though B．unless C．since D．before 39．__________ we have made the promise, let’s keep to it and not give up easily. A．Whether B．Unless C．Since D．Though 40．________ we have come to the old town, why not taste the local food? A．If B．Unless C．Since 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $ 班级 姓名 学号 分数 Unit 5 Music speaks 原因状语从句 （时间：60分钟，满分：100分） because 和 for 引导的原因状语从句 原因状语从句是指在复合句中表示主句动作发生原因的句子。我们可以用 because 和 for 引导原因状语从句。如： I did not go to school yesterday because I was ill. 我昨天没去上学，因为我生病了。 Because it was raining, we had to stay at home. 因为下雨，我们只好待在家里。 The kids were excited about his arrival, for he would bring them some New Year presents. 孩子们为他的到来而兴奋，因为他将给他们带些新年礼物。 注意：because 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；for 引导的原因状语从句位于主句之后。 ◆ because 意思是“因为”，表示动作发生的直接原因，语气很强，常用来回答 why 引导的疑问句。for 意思是“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。如： —Why didn’t he go with us today? 他为什么今天没跟我们一起去？ —Because he was too tired. 因为他太累了。 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。 ◆ 汉语里我们习惯说“因为……所以……”，但使用英语时不能将 because 与 so 连用。如： Because my bike was broken, I went to school by bus yesterday. ( ✓ ) Because my bike was broken, so I went to school by bus yesterday. ( × ) since 和 as 引导的原因状语从句 我们也可以用 since 和 as 引导原因状语从句。如： Since China’s high-speed railway reaches more and more cities, it’s easier for people to travel around now. 由于中国通高铁的城市越来越多，如今人们出行更方便了。 As you were not there, I left a message. 因为你不在那里，所以我留言了。 注意：和 because 相比，since 和 as 的语气稍弱。 ◆ since 意思是“既然，由于，因为”，表示已知的、显然的理由，较正式，多位于句首。如： Since it is late, I shall go home right now. (由于) 时间不早了，我得马上回家。 ◆ as 和 since 的用法大体相同，表示附带说明的双方已知的原因。如： As it is raining, you’d better take a taxi. 既然在下雨，你最好乘出租车。 单项选择(本大题共40小题，每小题2.5分，共100分) because 和 for 引导的原因状语从句 1．He didn’t pass the math exam ______ he didn’t study hard. He only played games after school. A．so B．because C．but D．and 【答案】B 【详解】句意：他没有通过数学考试是因为他没有努力学习。他放学后只是玩游戏。 考查连词辨析。so所以；because因为；but但是；and和。根据“He didn’t pass the math exam...he didn’t study hard.”可知，前后是因果关系，后面表示原因，用because连接。故选B。 2．He didn’t go to the concert ______ he didn’t like classical music, not ______ he was busy. A．because; because B．if; because C．because; if D．if; if 【答案】A 【详解】句意：他没有去听音乐会是因为他不喜欢古典音乐，而不是因为他很忙。 考查连词辨析。because因为；if如果。在句子中，第一空需表示原因，解释“没去音乐会”的理由，用because；第二空在“not”后，需构成“not because”固定表达，表示“而不是因为”，即：否定另一个原因。故选A。 3．—Why did you choose to study abroad? —________ I want to experience different educational systems and broaden my horizons. A．Because B．Since C．As D．For 【答案】A 【详解】句意：——你为什么选择出国留学？——因为我想体验不同的教育体系和拓宽我的视野。 考查连词辨析。Because因为，用于直接回答why问题，强调原因；Since既然，表示已知或明显原因；As由于，表示原因但较正式；For因为，但通常用于书面语且不用于句首回答问题。根据“Why did you choose to study abroad”可知，此处回答why问题，需用because，故选A。 4．—What type of TV programmes do you think is the most educational? —Documentaries, ________ they can offer a lot of knowledge about nature and society. A．because B．if C．unless D．though 【答案】A 【详解】句意：——你认为哪种电视节目最有教育意义？——纪录片，因为它们能提供很多关于自然和社会的知识。 考查连词辨析。because因为；if如果；unless除非；though尽管。根据语境可知，此处是在解释纪录片最有教育意义的原因，即“它们能提供很多关于自然和社会的知识”，所以应该用because引导原因状语从句。故选A。 5．Miranda loves spring best ________ she enjoys painting outdoors in this season. A．so B．before C．but D．because 【答案】D 【详解】 句意：米兰达最喜欢春天，因为她喜欢在这个季节户外画画。    考查连词辨析。“喜欢户外画画”是“最喜欢春天”的原因，前后为因果关系。so因此，表示结果；before在……之前，表示时间；but但是，表示转折；because因为，表示原因。根据“Miranda loves spring best ... she enjoys painting outdoors in this season.”可知，此处应选because引出原因。故选D。 6．Everyone wants to make friends with Andy, ________ he is very friendly. A．but B．because C．so D．or 【答案】B 【详解】句意：每个人都想和安迪交朋友，因为他很友好。 考查连词辨析。but但；because因为；so所以；or或。根据“Everyone wants to make friends with Andy… he is very friendly.”的语境可知，此处表示因果关系，前果后因，B项符合。故选B。 7．There’s no need to take a taxi _______ it’s only five minutes’ walk from here. A．because B．while C．though D．until 【答案】A 【详解】句意：没必要坐出租车，因为从这里步行只有五分钟的路程。 考查连词辨析。because因为；while当……时候；though虽然；until直到。根据“There’s no need to take a taxi…it’s only five minutes’ walk from here.”可知，后面的句子it’s only five minutes’ walk from here是前面There’s no need to take a taxi的原因，所以需要一个表示原因的连词，because符合语境。故选A。 8．—Mum, may I have more chocolate? —You’d better not, ________ too much sweet food is bad for health. A．while B．although C．because 【答案】C 【详解】句意：——妈妈，我可以再吃点巧克力吗？——你最好不要吃，因为吃太多甜食对健康有害。 考查连词辨析。while然而；although尽管；because因为。根据“too much sweet food is bad for health.”可知，因为太多的甜食对健康有害，所以不能再吃巧克力了。故选C。 9．More teachers are willing to receive AI training ________ AI technology in helping with teaching becomes more and more popular. A．or B．unless C．because D．though 【答案】C 【详解】句意：更多的老师愿意去接受AI培训，因为AI科技在辅助教学方面变得越来越受欢迎。 考查连词辨析。or或者；unless除非；because因为；though尽管。根据“AI technology...becomes more and more popular.”可知空后的句子表示老师选择AI培训的原因，用because引导原因状语从句，故选C。 10．The day must be breaking, ________ the birds have begun singing. A．because B．as C．for D．since 【答案】C 【详解】句意：天一定亮了，因为鸟儿已经开始唱歌了。 考查连词辨析。because因为，即用于首句，也可用于末句，表示直接原因，别人不知道的原因；as因为，表示已经知道的原因；for因为，对结果作出解释说明；since因为，强调双方已知，不需多解释的原因，根据空前的“The day must be breaking”和空后的“the birds have begun singing”可知，此处是在解释说明，故选C。 11．I can't tell whether she is old or young, ________ I have never seen her. A．but B．for C．or D．so 【答案】B 【详解】句意：我分不清她是老是年轻。因为我从未见过她。 考查连词辨析。but但是；for因为；or否则，或者；so所以。根据“I can’t tell whether she is old or young, ...I have never seen her.”可知，这里填for，表示原因。故选B。 12．We should save energy, ________ it helps slow down global warming. A．but B．so C．for D．though 【答案】C 【详解】句意：我们应该节约能源，因为它有助于减缓全球变暖。 but但是；so所以；for因为；though虽然。根据“We should save energy”及“it helps slow down global warming”可知，后半句是前半句的原因，for表示原因。 13．People should use recyclable bottles, ________ it can help reduce pollution. A．but B．so C．for D．though 【答案】C 【详解】句意：人们应该使用可回收的瓶子，因为它可以帮助减少污染。 but但是；so所以；for因为；though虽然。根据“it can help reduce pollution”可知，后半句解释了前半句建议的原因，for在此处表示原因。应填for。 14．—Why do you like doing calligraphy? —________ it can make me calm down. A．Because B．So C．But 【答案】A 【详解】句意：——你为什么喜欢练习书法？——因为它能让我平静下来。 Because因为；So所以；But但是。根据问句Why可知，答句应解释原因，Because符合语境。故选A。 15．—Why do you love painting? —________ it helps me express my feelings. A．Because B．So C．But 【答案】A 【详解】句意：——你为什么喜欢画画？——因为它帮助我表达我的感情。 Because因为；So所以；But但是。根据问句“Why do you love painting?”可知，此处是询问原因，回答应用Because引导。 16．She didn’t go to the cinema with us ________ she had to finish her project. A．because B．until C．so that D．wherever 【答案】A 【详解】句意：她没和我们一起去电影院，因为她必须完成她的项目。 because因为；until直到；so that以便；wherever无论哪里。前后句是因果关系，后句“she had to finish her project”是前句“She didn’t go to the cinema with us”的原因，由because引导原因状语从句，解释前面动作发生的原因，符合前后逻辑。 17．We can see many stars clearly at night ________ there is no light pollution here. A．so B．because C．but D．though 【答案】B 【详解】句意：我们在晚上能清晰地看到许多星星，因为这里没有光污染。 so所以；because因为；but但是；though虽然。根据句意可知，后半句“这里没有光污染”是前半句“能清楚地看到星星”的原因，表示原因应用because。故选B。 18．I read the book Around the World in Eighty Days ________ I like Jules Verne’s novels very much. A．because B．so C．but D．or 【答案】A 【详解】句意：我读了《八十天环游地球》这本书，因为我非常喜欢儒勒·凡尔纳的小说。 because因为；so所以；but但是；or或者。根据后半句“I like Jules Verne’s novels very much”可知，这是读这本书的原因，前后句为因果关系，且后句解释原因，故用because。 19．We should eat more fruit and vegetables ________ they are good for our health. A．so B．because C．but D．or 【答案】B 【详解】句意：我们应该多吃水果和蔬菜，因为它们对我们的健康有益。 so所以；because因为；but但是；or或者。根据句意，前后两句是因果关系，“它们对我们的健康有益”是“我们应该多吃水果和蔬菜”的原因，因此应选用表示原因的连词because。 20．We should face the growing pains bravely, ________ they can make us stronger and better. A．so B．because C．but D．or 【答案】B 【详解】句意：我们应该勇敢面对成长的烦恼，因为它们能让我们变得更强更好。 so所以；because因为；but但是；or或者/否则。根据题干“they can make us stronger and better”可知，这是解释为什么应该勇敢面对烦恼的原因，应用because引导原因状语从句，应填because。 since 和 as 引导的原因状语从句 21．________ you haven’t met your new workmates before, I’ll introduce you to them at the party. A．While B．So C．But D．Since 【答案】D 【详解】句意：既然你以前从未见过你的新同事，我会在聚会上把你介绍给他们。 While当……时候；So所以；But但是；Since既然；因为。根据语境，前后句存在因果关系，前半句是原因，Since引导原因状语从句，意为“既然”。 22．— Mum, the Maths problem is too difficult for me. —________ you can’t work it out by yourself, why not ask your teacher for help? A．While B．When C．Before D．Since 【答案】D 【详解】句意：——妈妈，这道数学题对我来说太难了。——既然你自己解不出来，为什么不向老师求助呢？ While当……时候/然而；When当……时候；Before在……之前；Since既然。根据“you can’t work it out by yourself, why not ask your teacher for help?”可知，前后句构成因果关系，表示“既然”解不出题，建议求助。应填Since。 23．________ the disease is still spreading rapidly, wearing a mask is quite necessary. A．Before B．Unless C．Although D．Since 【答案】D 【详解】句意：由于疾病仍在快速传播，戴口罩是很有必要的。 Before在……之前，引导时间状语从句；Unless除非，引导条件状语从句，相当于if not；Although虽然，尽管，引导让步状语从句；Since因为，既然，引导原因状语从句，也可表示“自从”引导时间状语从句。分析前后分句逻辑，“疾病仍在快速传播”是“戴口罩很有必要”的原因，二者为因果关系，Since用于引出原因，符合语境；其他选项中，Before代入后时间逻辑不通，Unless引导条件时句意逻辑矛盾，Although引导让步时前后应为转折关系，与句意不符，Since符合语法规则和语境。 24．—Do you think kids should help out with chores at home? —________ they live in one house with their parents, they should do their part. A．Unless B．Although C．Since 【答案】C 【详解】句意：——你认为孩子应该在家帮忙做家务吗？——既然他们和父母住在一个房子里，他们应该尽自己的一份力。 考查连词辨析。Unless除非；Although虽然，尽管；Since既然。根据“they live in one house with their parents, they should do their part.”可知，前后句为因果关系，应用since引导原因状语从句。故选C。 25．—I feel bored and I have no idea of what to do now. —Well. ________ you are so free, you can help me fold the clothes. A．Although B．Until C．Since D．Unless 【答案】C 【详解】句意：——我感到无聊，不知道现在该做什么。——嗯。既然你有空，你可以帮我叠衣服。 考查连词辨析。although虽然；until直到；since既然；unless除非。前后两句是因果关系，此处表示原因，用since引导原因状语从句。故选C。 26．We have to stay at home ________ the weather is bad. A．as B．so C．but D．than 【答案】A 【详解】句意：因为天气不好，我们不得不待在家里。 as因为；so所以；but但是；than比。“We have to stay at home”是结果，“the weather is bad”是原因，空处需要一个引导原因状语从句的连词，as意为“因为”，可引导原因状语从句。 27．________ I’m very tired, I am going to bed early. A．Until B．As C．Though D．While 【答案】B 【详解】句意：由于我很累，所以我要早点睡觉。 考查连词辨析。Until直到；As因为；Though虽然；While然而。根据“I’m very tired, I am going to bed early.”可知是指“由于我很累，所以我要早点睡觉”，故此处用as引导原因状语从句。故选B。 28．________ 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。 29．You can’t feed cats any chocolate ________ it’s harmful to them. A．though B．so C．while D．as 【答案】D 【详解】句意：你不能给猫喂巧克力，因为那对它们有害。 考查连词辨析。though虽然；so因此；while当……时；as因为。“it’s harmful to them”是“You can’t feed cats any chocolate”的原因，用as引导原因状语从句，故选D。 30．________ you didn’t answer my call, I left a message on WeChat. A．If B．As C．While D．Before 【答案】B 【详解】句意：由于你没有接我的电话，所以我在微信上留言了。 考查连词辨析。If如果；As由于，因为；While当……的时候；Before在……以前。根据“...you didn’t answer my call, I left a message on WeChat.”可知，因为对方没接电话，所以我才在微信上留言，前半句是后半句的原因，因此“As”符合语境。故选B。 31．________ the coolest winter is coming in Britain, electronic heating products made in China have become best sellers there last year. A．As B．If C．Though 【答案】A 【详解】句意：因为英国最寒冷的冬天的到来，中国制造的电子暖气产品成为去年英国最畅销的产品。 考查连词辨析。As因为；If如果；Though尽管。根据“the coolest winter is coming in Britain, electronic heating products made in China have become best sellers there last year.”可知，前后句是因果关系，用as引导原因状语从句，故选A。 32．—You recommend me to wear an orange shirt today, right? —Yes. ________ orange can bring you good luck, it is good for your interview. A．As B．When C．If D．While 【答案】A 【详解】句意：——你建议我今天穿一件橙色的衬衫，对吗？——是的。因为橙色能给你带来好运，所以它对你的面试有好处。 考查连词辨析。As因为；When当……时；If如果；While然而。根据“orange can bring you good luck, it is good for your interview.”可知，前后两个句子之间是因果关系，所以题空处应填从属连词as。故选A。 33．Life is like a one-way race, so treasure every moment ________ time cannot be won again. A．so B．as C．if D．unless 【答案】B 【详解】句意：生活就像单程赛，所以珍惜每个时刻，因为时光一去不复返。 考查连词辨析。so所以；as因为；if如果；unless除非；根据句意，珍惜每个时刻……时光一去不复返，可知此处用as，表示“因为”。故选B。 34．________ you know little about this art form, you can find a book to learn. A．Though B．While C．When D．Since 【答案】D 【详解】句意：既然你对这种艺术形式知之甚少，你可以找本书来学习。 考查连词辨析。Though尽管；While然而；When当……时候；Since既然，因为。根据“...you know little about this art form, you can find a book to learn.”可知，前句“对艺术形式了解甚少”是后句“学习”的原因，设空处引导原因状语从句，选项D符合语境。故选D。 35．—It’s said that Xinyuan mutton tastes delicious. —Well, ________ we are here, why not go to the restaurant and order some? A．though B．unless C．since D．whenever 【答案】C 【详解】句意：——据说鑫源羊肉味道鲜美。——嗯，既然我们都来了，为什么不去餐厅点一些呢？ 考查连词辨析。though尽管；unless除非；since既然；whenever无论何时。根据“...we are here, why not go to the restaurant and order some?”可知，既然我们在这里，为什么不去饭店点一些吃呢，since符合语境，引导原因状语从句。故选C。 36．_________ you are free today, could you help me with housework? A．Since B．Though C．Unless D．Until 【答案】A 【详解】句意：既然你今天有空，你能帮我做家务吗？ 考查从属连词辨析。Since既然；Though尽管；Unless除非；Until直到。根据“you are free today”可知，今天有空，就可以帮忙做家务，此处应用since引导原因状语从句。故选A。 37．________ you have grown up, you should learn to look after yourselves. A．Since B．Until C．Although D．Unless 【答案】A 【详解】句意：既然你已经长大了，你就应该学会照顾自己。 考查连词辨析。Since既然；Until直到；Although尽管；Unless除非。根据“you should learn to look after yourselves”和“you should learn to look after yourselves”可知二者为因果关系，故选A。 38．—It’s said that Zhenjiang Pot Cover Noodles are very delicious. —Well, ________ we are here, why not have a try? A．though B．unless C．since D．before 【答案】C 【详解】句意：——据说镇江锅盖面很好吃。——嗯，既然我们来了，为什么不试一试呢？ 考查连词辨析。though尽管；unless除非；since既然；before在……之前。分析句子可知，此处指既然都到镇江了，就去试试锅盖面，应用since引导原因状语从句。故选C。 39．__________ we have made the promise, let’s keep to it and not give up easily. A．Whether B．Unless C．Since D．Though 【答案】C 【详解】句意：既然我们已经许下了诺言，就让我们信守诺言，不要轻易放弃。 考查连词。Whether是否；Unless除非；Since既然；Though虽然。根据“we have made the promise, let’s keep to it and not give up easily.”可知，此处表达的是因果关系，应用since连接，引导原因状语从句。故选C。 40．________ we have come to the old town, why not taste the local food? A．If B．Unless C．Since 【答案】C 【详解】句意：既然我们来到了这个古镇, 为什么不尝尝当地的食物呢？ 考查连词辨析。If如果；Unless除非；Since自从、既然。根据“we have come to the old town, why not taste the local food? ”可知，该句表示的是“既然已经来了古镇，为什么不品尝当地的事物呢？”，所以使用Since引导原因状语从句。故选C。 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $