Unit 7 The unknown world 语法Grammar 原因状语从句-2024-2025学年八年级英语下册单元重难点易错题精练（沪教牛津版）

Unit 7 The unknown world 原因状语从句 （时间：40分钟，满分：100分） 一、单项选择(本大题共30小题，每小题2分，共60分) 1．—Which film would you like to watch tonight, You Only Live Once or Article 20? — ________ is OK. Both of them are good movies. A．Neither B．Either C．Both 【答案】B 【详解】句意：——今晚你想看哪部电影，《热辣滚烫》还是《第20条》？ ——都可以。它们都是好电影。 考查代词辨析。neither两者都不；either（两者中的）任何一个；both两者都。根据“Both of them are good movies.”可知，这两部电影都可以，排除A选项。谓语动词“is”是单数，而both作主语时，谓语动词要用复数形式，排除C。故选B。 2．—Tom, pass me the glasses ________ I can’t see the words clearly. —Here you are. A．so B．since C．though 【答案】B 【详解】句意：——汤姆，把眼镜递给我，因为我看不清楚上面的字。——给你。 考查连词辨析。so所以；since因为；though尽管。根据“I can’t see the words clearly.”可知，因为看不清，所以需要眼镜，要用since引导原因状语从句。故选B。 3．We didn’t catch the bus ________ we got up late. A．until B．so C．because 【答案】C 【详解】句意：我们没赶上公共汽车，因为我们起晚了。 考查连词辨析。until直到；so所以；because因为。根据“We didn’t catch the bus...we got up late.”可知，前后是因果关系，后面表示原因，用because连接。故选C。 4．—We should put on thick coats ____________ the temperature drops, or we might catch a cold. —Good advice! Being prepared is always better than getting sick. A．since B．though C．unless D．until 【答案】A 【详解】句意：——因为气温下降，我们应该穿上厚外套，否则可能会感冒。——好建议！做好准备总比生病强。 考查连词辨析。since因为；though虽然；unless除非；until直到。根据“We should put on thick coats ... the temperature drops”可知，后句是前句的原因，用since引导原因状语从句。故选A。 5．Let’s stop to have a rest, ________ we all feel very tired. A．since B．unless C．so D．although 【答案】A 【详解】句意：既然我们都觉得累，让我们停下来休息吧。 考查连词。since既然、因为；unless除非、如果不；so所以；although尽管。根据“Let’s stop to have a rest, ...we all feel very tired.”可知，“觉得累”是“停下来休息”的原因，since表示原因。故选A。 6．I didn’t arrive on time ________ it rained heavily yesterday. A．though B．because C．when 【答案】B 【详解】句意：我没有按时到达，因为昨天雨下得很大。 考查从属连词辨析。though尽管；because因为；when当……时候。根据“I didn’t arrive on time…it rained heavily yesterday.”可知，此处表达没有按时到的原因，空处应用because引导原因状语从句。故选B。 7．________ everybody is here, let’s begin our class. A．Before B．Since C．So D．Although 【答案】B 【详解】句意：既然每个人都到了，那就让我们开始上课吧。 考查连词。before在……之前；since既然，自从；so因此；although尽管。根据“...everybody is here, let’s begin our class.”可知，让我们开始上课是在学生到齐之后。所以用since，表“既然”。故选B。 8．________ we are young, we shouldn’t be too afraid of making mistakes. A．Though B．Since C．When D．If 【答案】B 【详解】句意：既然我们很年轻，我们就不应该害怕犯错误。 考查从属连词用法。Though尽管，虽然；Since既然，由于；When当……时候；If 如果。根据“..., we shouldn’t be too afraid of making mistakes.”可知，前后两句的逻辑关系为因果关系。主句是结果，从句是原因。故选B。 9．—How was your trip? —Not good. ________ we didn’t have much time, we had to visit some places of interest quickly. A．Until B．Since C．While D．Though 【答案】B 【详解】句意：——你们的旅行怎么样？——不太好。由于我们没有太多的时间，我们不得不迅速参观一些名胜古迹。 考查连词辨析。Until直到；Since因为；While然而；Though虽然。根据“…we didn’t have much time, we had to visit some places of interest quickly.”可知，前后句之间是因果关系，此处应用Since引导原因状语从句。故选B。 10．My brother didn’t buy the ticket ________ it was too expensive. A．though B．so C．because 【答案】C 【详解】句意：我哥哥没有买票，因为它太贵了。 考查连词辨析。though尽管；so所以；because因为。根据“My brother didn’t buy the ticket”可知，因为票太贵了，所以没有买票，故选C。 11．—Several earthquakes struck Taiwan Province this month. —It is difficult to warn people about them, ________ earthquakes always happen suddenly. A．so B．or C．because 【答案】C 【详解】句意：——本月台湾省发生了多次地震。——很难对人们发出警告，因为地震总是突然发生。 考查原因状语从句。so所以；or或者；because因为。根据“It is difficult to warn people about them...earthquakes always happen suddenly.”可知，后句是前句原因，应用because引导原因状语从句。故选C。 12．Tom felt unhappy, ________ he didn’t think his classmates liked him. A．though B．so C．unless D．because 【答案】D 【详解】句意：汤姆感到不高兴，因为他认为他的同学不喜欢他。 考查连词辨析。though尽管；so所以；unless除非；because因为。根据“Tom felt unhappy…he didn’t think his classmates liked him.”的语境可知，前后句之间表示因果关系，前果后因，用because引导原因状语从句。故选D。 13．________ you break your legs, you must stay at home and rest for a few days. A．Unless B．Although C．Since 【答案】C 【详解】句意：既然你摔断了腿，你必须待在家里休息几天。 考查连词辨析。Unless除非；Although虽然，即使；Since既然。根据“you break your legs, you must stay at home and rest for a few days.”可知此处指既然摔断了腿，就必须待在家里休息几天。故选C。 14．It’s important to keep learning about new ideas and technology ________ the world changes so fast. A．so B．or C．since D．unless 【答案】C 【详解】句意：世界变化如此之快，不断学习新思想和新技术是很重要的。 考查连词辨析。so所以；or或者；since因为；unless除非。“the world changes so fast”是“It’s important to keep learning about new ideas and technology”的原因，用since引导原因状语从句，故选C。 15．He can’t take part in the football game not ________ the time but ________ he is ill (生病). A．because of; because B．because; because C．because; because of D．because of; because of 【答案】A 【详解】句意：他不能参加足球比赛不是因为时间 (的原因)，而是因为他生病了。 考查because of和because的区别。because of因为，介词短语，后接名词、代词或动名词等；because因为，连词，后接句子。第一空后“the time”是名词，应用because of，排除B和C；第二空后“he is ill”是句子，应用because引导，排除D。故选A。 16．________ everyone will face trouble in their lives, why don’t we give a helping hand? A．Until B．When C．Since D．While 【答案】C 【详解】句意：既然每个人在生活中都会遇到麻烦，那我们为什么不伸出援手呢？ 考查从属连词辨析。Until直到……为止；When当……时候；Since既然；While当……时候。分析句子结构可知，前后两句是因果关系，基于大家生活中都会遇到麻烦这一既定事实，提出了一个建议或疑问，即我们为什么不伸出援手帮助他们呢？应用since引导原因状语从句。故选C。 17．You shouldn’t listen to loud music ________ it may hurt your ears. A．because B．but C．so D．although 【答案】A 【详解】句意：你不应该听大声的音乐，因为它可能会伤害你的耳朵。 考查连词辨析。because因为；but但是；so所以；although虽然。根据“You shouldn’t listen to loud music ... it may hurt your ears.”可知，前后句子之间是因果关系，此处应用because引导原因状语从句。故选A。 18．The boy was safe ________ the police came in time. A．because B．but C．or D．and 【答案】A 【详解】句意：男孩很安全，因为警察及时到来。 考查连词辨析。because因为；but但是；or或者；and而且。根据“The boy was safe ... the police came in time.”可知，因为警察及时到来，所以男孩安全了。故选A。 19．________ he thinks science is boring, ________ he doesn’t like it. A．Because; so B．Because; / C．So; / D．So; because 【答案】B 【详解】句意：因为他认为科学很无聊，所以他不喜欢它。 考查连词。because因为，so所以。两者不连用，排除AD；前后句是因果关系，前句是原因，应用because。故选B。 20．________ everybody is here, let’s begin our class. A．Before B．Since C．On the one hand D．If 【答案】B 【详解】句意：既然大家都到了，我们开始上课吧。 考查连词辨析。Before在……之前；Since既然，因为；On the one hand一方面；If如果。根据“...everybody is here, let’s begin our class.”可知，可以开始上课是因为大家都到了，since引导原因状语从句。故选B。 21．—The boy didn’t come to school ________ the bad weather. —No, ________ he was ill. A．because of, because B．because, because of C．because, because 【答案】A 【详解】句意：——由于糟糕的天气，男孩没来上学。——没有，因为他生病了。 考查because与because of的用法区别。because of后接名词性短语，而because后接句子。第一空后的“the bad weather”是名词性短语，因此用because of；第二空后的“he was ill”是一个句子，因此用because。故选A。 22．I didn’t go to the supermarket ________ the weather was bad. A．so B．or C．but D．because 【答案】D 【详解】句意：我没有去超市，因为天气不好。 考查连词辨析。so所以；or或者；but但是；because因为。根据“I didn’t go to the supermarket”以及“the weather was bad”的语境可知，此处表示原因，用because引导原因状语从句。故选D。 23．The sky is bluer ________ we have taken action to protect the environment. A．because B．before C．until D．unless 【答案】A 【详解】句意：天空更蓝了，因为我们已经采取行动保护环境。 考查连词辨析。because 因为；before在……之前；until直到；unless 除非。根据“we have taken action to protect the environment”可知，此处是表示原因，用because引导原因状语从句。故选A。 24．Jill’s mother can’t take her to the zoo ________ she has no time. A．because B．when C．if D．however 【答案】A 【详解】句意：吉尔的妈妈不能带她去动物园，因为她没有时间。 考查连词辨析。because因为；when当……时候；if如果；however无论如何。根据“Jill’s mother can’t take her to the zoo ... she has no time.”可知，因为妈妈没有时间，所以她不能带吉尔去动物园，用because引导原因状语从句。故选A。 25．Sally wants to buy a new shirt ________ hers is too old now. A．when B．where C．because D．how 【答案】C 【详解】句意：莎莉想买一件新衬衫，因为她的衬衫现在太旧了。 考查连词辨析。when当……时；where在哪里；because因为，由于；how怎样。根据“Sally wants to buy a new shirt …hers is too old now.”可知，空处后句为前句的原因，应用because连接。故选C。 26．He didn’t go to school yesterday ________ he was ill. A．because B．so C．if D．because of 【答案】A 【详解】句意：他昨天没有去上学，因为他病了。 考查连词。because因为，引导原因状语从句；so因此；if如果，引导条件状语从句；because of因为，后接名词或动名词。根据“He didn’t go to school yesterday…he was ill.”可知此处需用because引导原因状语从句，表示昨天没有去上学，因为他病了。故选A。 27．I can’t fix the watch ________ I have no tools. A．because B．after C．and D．or 【答案】A 【详解】句意：我不能修好这块表，因为我没有工具。 考查状语从句。because因为；after在……之后；and和；or或者。“没有工具”是“不能修好这块表”的原因，用because引导原因状语从句。故选A。 28．I didn’t go out ________ the weather was bad. A．because B．because of C．so D．but 【答案】A 【详解】句意：我没有外出因为天气不好。 考查连词辨析。because因为，引导从句；because of因为，后跟名词或名词短语；so因此；but但是。空后“the weather was bad”是解释空前“没有外出”的原因，且空后是完整的句子，所以用because。故选A。 29．________ we are in the same class, we must do our part in fighting for our team honor. A．Although B．Since C．Before D．While 【答案】B 【详解】句意：既然我们在同一个班，我们就必须尽自己的一份力量为我们的团队荣誉而战。 考查连词辨析。Although尽管；Since因为，既然；Before在……之前；While然而。根据“...we are in the same class, we must do our part in fighting for our team honor”可知，两句是因果关系，故选B。 30．I like Meiwei Restaurant best ________ it has the most delicious rice noodles and the best service. A．because B．but C．so D．or 【答案】A 【详解】句意：我最喜欢美味餐馆，因为它有最美味的米粉和最好的服务。 考查连词。because因为，表原因；but但是，表转折；so所以，表因果；or或者，表选择。根据“it has the most delicious rice noodles and the best service.”表“最喜欢美味餐馆”的原因，可知填because，引导原因状语从句。故选A。 二、完成句子(本大题共10小题，每小题4分，共40分) 31．我喜欢读书，因为它能增长我的知识。 I like reading . 【答案】because it can improve my knowledge 【详解】对照中英文可知，缺少“因为它能增长我的知识。”用because引导的原因状语从句。“它”用it，“能”用can，后接动词原形；“增长我的知识”用improve my knowledge，knowledge不可数，故填because it can improve my knowledge。 32．因为天气炎热，我们玩的不开心。 We didn’t good time it hot. 【答案】 have a because was 【详解】根据题干可知，空①②缺少“玩的(不开心)”，用动词短语have a good time“玩得开心”中的have a表示，位于助动词didn’t后用动词原形；空③缺少“因为”，用连词because表示；空④缺少be动词，主语为it，时态为一般过去时，be动词用was。故填have；a；because；was。 33．你既然错了，就应该道歉。 You should apologize . 【答案】 since you were/are wrong 【详解】根据中英文对照可知，此处应用since“既然”引导原因状语从句。you“你”，作主语；wrong“错误的”，形容词作表语。从句时态是一般过去时或一般现在时，主语是第二人称，be动词用were/are。故填since；you；were/are；wrong。 34．由于大雨，他们没去看电影 They didn’t go to the movies . 【答案】because of the heavy rain/because it rained heavily 【详解】根据中英文提示可知，此处可以用“because of+名词”或“because引导原因状语从句”说明没去看电影的原因；because of the heavy rain“由于大雨”；rain“下雨”，动词，heavily“大量地”，副词，修饰动词rain；根据“didn’t”可知，时态为一般过去时，动词使用过去式，it rained heavily“下大雨”。故填because of the heavy rain/because it rained heavily。 35．既然你不说实话，我拒绝与你交朋友。 you don’t tell me the truth, I    make friends with you. 【答案】 Since refuse to 【详解】根据题干，既然：since，用来表示大家都知道的原因，句首字母需大写；拒绝做某事：refuse to do sth，句子是一般现在时，主语是第一人称，谓语动词用原形。故填Since；refuse；to。 36．既然没有其他人看到这些外星人，我拒绝相信你的话。 no one else saw these aliens, I believe you. 【答案】 Since refuse to 【详解】since表示“既然”，引导原因状语从句；refuse to do“拒绝做”。结合语境可知，“我拒绝相信你的话”是发生在现在，表示现在不相信对方的话，主语是I，动词用原形。故填Since；refuse；to。 37．玛丽不得不和她的玩具熊分开，因为她的卧室太小了。 Mary has to her toy bear her bedroom is too small. 【答案】 part with because 【详解】根据中文意思可知本题考查短语part with“和……分开”和单词because“因为”，have to“不得不”后续动词原形，而because引导原因状语从句，故填part；with；because。 38．That patient is danger now the doctors and nurses have done a brilliant job to save him. 那个病人已无大碍，因为医生们和护士们对他做了出色的抢救工作。 【答案】 out of because 【详解】“已无大碍” 对应的英文表达是“out of danger”；“因为”对应的英文表达是连词“because”。故填out；of；because。 39．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。 40．我喜欢宠物狗，因为它们可爱又忠诚。 I like pet dogs they are and faithful. 【答案】 because cute/lovely 【详解】because“因为”，引导原因状语从句；cute/lovely“可爱的”，形容词，在句中作表语。故填because；cute/lovely。 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 $$ Unit 7 The unknown world 原因状语从句 （时间：40分钟，满分：100分） 一、单项选择(本大题共30小题，每小题2分，共60分) 1．—Which film would you like to watch tonight, You Only Live Once or Article 20? — ________ is OK. Both of them are good movies. A．Neither B．Either C．Both 2．—Tom, pass me the glasses ________ I can’t see the words clearly. —Here you are. A．so B．since C．though 3．We didn’t catch the bus ________ we got up late. A．until B．so C．because 4．—We should put on thick coats ____________ the temperature drops, or we might catch a cold. —Good advice! Being prepared is always better than getting sick. A．since B．though C．unless D．until 5．Let’s stop to have a rest, ________ we all feel very tired. A．since B．unless C．so D．although 6．I didn’t arrive on time ________ it rained heavily yesterday. A．though B．because C．when 7．________ everybody is here, let’s begin our class. A．Before B．Since C．So D．Although 8．________ we are young, we shouldn’t be too afraid of making mistakes. A．Though B．Since C．When D．If 9．—How was your trip? —Not good. ________ we didn’t have much time, we had to visit some places of interest quickly. A．Until B．Since C．While D．Though 10．My brother didn’t buy the ticket ________ it was too expensive. A．though B．so C．because 11．—Several earthquakes struck Taiwan Province this month. —It is difficult to warn people about them, ________ earthquakes always happen suddenly. A．so B．or C．because 12．Tom felt unhappy, ________ he didn’t think his classmates liked him. A．though B．so C．unless D．because 13．________ you break your legs, you must stay at home and rest for a few days. A．Unless B．Although C．Since 14．It’s important to keep learning about new ideas and technology ________ the world changes so fast. A．so B．or C．since D．unless 15．He can’t take part in the football game not ________ the time but ________ he is ill (生病). A．because of; because B．because; because C．because; because of D．because of; because of 16．________ everyone will face trouble in their lives, why don’t we give a helping hand? A．Until B．When C．Since D．While 17．You shouldn’t listen to loud music ________ it may hurt your ears. A．because B．but C．so D．although 18．The boy was safe ________ the police came in time. A．because B．but C．or D．and 19．________ he thinks science is boring, ________ he doesn’t like it. A．Because; so B．Because; / C．So; / D．So; because 20．________ everybody is here, let’s begin our class. A．Before B．Since C．On the one hand D．If 21．—The boy didn’t come to school ________ the bad weather. —No, ________ he was ill. A．because of, because B．because, because of C．because, because 22．I didn’t go to the supermarket ________ the weather was bad. A．so B．or C．but D．because 23．The sky is bluer ________ we have taken action to protect the environment. A．because B．before C．until D．unless 24．Jill’s mother can’t take her to the zoo ________ she has no time. A．because B．when C．if D．however 25．Sally wants to buy a new shirt ________ hers is too old now. A．when B．where C．because D．how 26．He didn’t go to school yesterday ________ he was ill. A．because B．so C．if D．because of 27．I can’t fix the watch ________ I have no tools. A．because B．after C．and D．or 28．I didn’t go out ________ the weather was bad. A．because B．because of C．so D．but 29．________ we are in the same class, we must do our part in fighting for our team honor. A．Although B．Since C．Before D．While 30．I like Meiwei Restaurant best ________ it has the most delicious rice noodles and the best service. A．because B．but C．so D．or 二、完成句子(本大题共10小题，每小题4分，共40分) 31．我喜欢读书，因为它能增长我的知识。 I like reading . 32．因为天气炎热，我们玩的不开心。 We didn’t good time it hot. 33．你既然错了，就应该道歉。 You should apologize . 34．由于大雨，他们没去看电影 They didn’t go to the movies . 35．既然你不说实话，我拒绝与你交朋友。 you don’t tell me the truth, I    make friends with you. 36．既然没有其他人看到这些外星人，我拒绝相信你的话。 no one else saw these aliens, I believe you. 37．玛丽不得不和她的玩具熊分开，因为她的卧室太小了。 Mary has to her toy bear her bedroom is too small. 38．That patient is danger now the doctors and nurses have done a brilliant job to save him. 那个病人已无大碍，因为医生们和护士们对他做了出色的抢救工作。 39．既然没有人看到，我拒绝相信你。 nobody saw it, I you. 40．我喜欢宠物狗，因为它们可爱又忠诚。 I like pet dogs they are and faithful. 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 $$