Unit 7 The unknown world 重点语法：原因状语从句精讲精练-2024-2025学年八年级英语下册重难点讲练全攻略（沪教牛津版）

2024-2025学年一线教师制作同步精品系列资料，好题优选！ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 7 The unknown world 重点语法：原因状语从句精讲精练 语法知识精讲 原因状语从句（Adverbial Clause of Reason）用于说明主句动作发生的原因，逻辑清晰，实用性强。掌握它的核心在于理解“因→果”关系，并正确使用连接词。 一、核心逻辑：连接词的选择 原因状语从句由特定的从属连词引导，不同连接词有细微区别： 1. because（最强语气） - 强调直接原因，回答“Why?” - 位置灵活，可放主句前（加逗号）或后。 - 例句： - He failed the exam because he didn’t study. （直接原因） - Because it was raining, we stayed at home. 2. since / as（较弱语气） - 表示已知的、显而易见的原因，常放句首。 - 区别： - since 稍正式，隐含“既然”（=now that）。 - as 多用于口语，原因更次要。 - 例句： - Since you’re tired, let’s take a break. （双方都知道“你累了”） - As it’s Sunday, the shop is closed. 3. for（补充说明，非直接原因） - 表推测性原因或附加解释，只能放主句后，前加逗号。 - 例句： - He must be ill, for he looks pale. （根据脸色“推测”生病） 二、逻辑对比：如何选择连接词？ 连接词 语气强度 位置 适用场景 because 最强 句首或句尾 直接原因，回答“为什么” since 中等 句首（常见 已知原因，类似“既然” as 较弱 句首 次要原因，口语化 for 最弱 句尾（加逗号） 补充解释，推测原因 三、易错点与注意事项 1. 不能与so连用： - ❌ Because he was ill, so he stayed home. （重复冗余） - ✅ Because he was ill, he stayed home. 或 He was ill, so he stayed home. 2. 时态一致性： - 主句和从句的时态通常一致（除非客观事实）。 - 例句： - He didn’t go to school because he had a fever. （过去一致） 3. 区分“because of”： - because + 句子，而 because of + 名词/代词。 - 对比： - He was late because the traffic was heavy. （从句） - He was late because of the heavy traffic. （短语） 语法知识精练 基础入门训练20题 1．________ 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。 2．It rained last night, ________ the ground is wet. A．or B．for C．but D．though 【答案】B 【详解】句意：昨晚下雨了，因为地上是湿的。 考查连词词义辨析。or或者；for因为，由于；but但是；though虽然，尽管。根据“the ground is wet”可知因为地面湿，所以认为昨晚下雨了，应用for表明附加或推断的理由。故选B。 3．Mr. Black was late for work ________ his car didn’t work on the way, not ________ the bad weather. A．because, because of B．because of, because C．because, because D．because of, because of 【答案】A 【详解】句意：布莱克先生上班迟到了因为他的车在路上坏了，不是因为天气不好。 考查连词和介词短语的用法。because用于引导原因状语从句；because of后需接名词或名词短语。空一处“his car didn’t work on the way,”是句子，用because；空二处后是名词短语“the bad weather”，用because of。故选A。 4．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。 5．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。 6．Read the sentence “I can tell her anything because she can keep a secret.” The underlined word “because” is used to __________. A．show time B．give examples C．make new words D．show cause and effect 【答案】D 【详解】句意：读这句话：“我可以告诉她任何事，因为她能保守秘密。”带下划线的单词“because”被用来表示因果关系。 考查连词功能。show time表示时间；give examples给出例子；make new words创造新词；show cause and effect表示因果。because用于引导原因状语从句，此处表示可以告诉她任何事情的原因，体现因果关系。故选D。 7．Lucy didn’t put up her hand _________ she didn’t know the answer to the question. A．because B．though C．until D．but 【答案】A 【详解】句意：露西没有举手，因为她不知道问题的答案。 考查连词。because因为；though虽然；until直到；but但是。根据“Lucy didn’t put up her hand…she didn’t know the answer to the question.”可知是指露西没有举手，因为她不知道问题的答案。故选A。 8． Charlie is Mr.Dancer’s eyes,let them in at once. A．Though B．Before C．Now that D．When 【答案】C 【详解】句意：既然查理是丹斯先生的眼睛，让他们立刻进来。 A. Though虽然；B. Before在……之前；C. Now that既然；D. When当……时候。根据Charlie is Mr. Dancer’s eyes, 解释让他们进来的原因，now that可引导原因状语从句，故选C。 9．________ all the guests are here, why don’t we begin the party at once? A．Although B．As soon as C．After D．Now that 【答案】D 【详解】句意：既然所有的客人都到了，我们为什么不马上开始聚会呢？ 考查状语从句用法。Although虽然、尽管；As soon as一……就……；After在……之后；Now that由于、既然。根据“…all the guests are here, why don’t we begin the party at once?”可知，既然所有的客人都到了，我们为什么不马上开始聚会呢？因此用Now that引导原因状语从句。故选D。 10．______ it’s your first visit to Britain, you’d better not miss its famous museums. A．Now that B．Unless C．When D．Although 【答案】A 【详解】句意：既然这是你第一次访问英国，你最好不要错过它著名的博物馆。 考查连词辨析。Now that既然；Unless除非；When当……时；Although虽然。根据“you’d better not miss its famous museums.”可知，此处是表示原因，应用now that引导原因状语从句，故选A。 11．______ everyone is here, let’s start for the Science Museum. A．Though B．After C．Now that D．Before 【答案】C 【详解】句意：既然每个人都到了，那我们开始去科技博物馆吧。 考查连词辨析。Though虽然；After在……后；Now that既然；Before在……前。“ everyone is here”是提出“let’s start for the Science Museum.”的原因，所以此处用Now that引导原因状语从句。故选C。 12．We must set out earlier than yesterday, ________ we will travel eighty miles today. A．though B．so C．for D．when 【答案】C 【详解】句意：我们必须比昨天早出发，因为今天我们要走80英里。 考查连词辨析。though尽管；so因此；for因为；when当……时。根据“We must set out earlier than yesterday, …we will travel eighty miles today”可知，空格前后是因果关系，遵循“前果后因”，用for引导原因状语从句，故选C。 13．The exam must be very difficult, ________ many students failed. A．though B．so C．for D．but 【答案】C 【详解】句意：这次考试一定很难，因为许多学生都没有通过。 考查连词辨析。though尽管；So所以；for因为；but但是。根据“The exam must be very difficult”可知，是根据后一句推测出“这次考试一定很难”，因此后一句是前一句的原因，故选C。 14．—As far as I know, Jane isn't used to working here. —Why not help her_______she's new? A．though B．until C．as D．if 【答案】C 【详解】句意：——据我所知，Jane还没有适应这里的工作。——既然她是新来的，咱们就多帮帮她。 考查连词词义辨析。though意为“尽管，虽然”；until意为“直到……”；as意为“既然，由于”；if意为“如果”。根据句意理解可知，这里表达的是“既然，由于”，所以as符合句意，在这里引导原因状语从句，故选C。 15．—Shall I give you a ride ________ it is so late? —Thank you. It couldn’t be better. A．if B．until C．before D．as 【答案】D 【详解】句意：——这么晚了，我送你一程好吗？——谢谢你。再好不过了。 考查连词辨析。if如果；until直到；before在……之前；as由于。“太晚了”是送对方一程的原因，用as引导原因状语从句，故选D。 16．________ he needed money for his marriage, he had to do a part-time job after work. A．As B．Though C．Because of D．So that 【答案】A 【详解】句意：因为结婚需要钱，他不得不在下班后去做兼职工作。 考查连词辨析。as因为；though尽管；because of因为（后接名词或名词性短语）；so that以便于。“he needed money for his marriage,”与“he had to do a part-time job after work”是因果关系，空格后是一个句子，用as引导原因状语从句，故选A。 17．Jim found it difficult to see the blackboard clearly_______ his eyesight became worse. A．but B．so C．as D．although 【答案】C 【详解】句意：由于视力越来越差，吉姆发现很难看清黑板。 考查连词辨析。but但是；so因此；as因为，由于；although尽管。分析句子可知，因为吉姆视力越来越差，所以看不清黑板，下文表原因，故用as连接。故选C。 18．________ we have no money, we can’t buy it. A．Until B．Unless C．As D．Although 【答案】C 【详解】句意：由于我们没有钱，我们不能买它。 考查连词辨析。Until直到……时；Unless除非；As由于；Although虽然。根据“…we have no money, we can’t buy it.”可知，前后句子是因果关系，因此用“as”来引导原因状语从句。故选C。 19．—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。 20．—________ you didn’t go to school without any reason, you should make an ________ to your teacher. —I am ready for it. A．Since; apology B．Since; excuse C．While; apology D．While; excuse 【答案】A 【详解】句意：——既然你没有交上作业，你应该向你的老师道歉。 ——好的，我马上道歉。 考查连词和名词辨析。since作连词，意为“既然”，引导原因状语从句；while(对比两件事物)……而，……然而；excuse借口；apology道歉。根据句意可知第一空只有用并列连词since才能说得通，排除C、D；根据“you didn’t go to school without any reason”可知需要向老师道歉，make an apology to sb.意为“向某人道歉”，故第二空用apology。故选A。 进阶拓展训练20题 21．—What shall we do now? — ________ it’s raining hard, let’s stay at home. A．So B．Since C．Though D．If 【答案】B 【详解】句意：——我们现在该怎么办？——既然雨下得很大，我们就呆在家里吧。 考查从属连词辨析。So 所以；Since 既然；Though 虽然；If 如果。根据“…it’s raining hard, let’s stay at home.”可知，空处指的是“既然雨下得大”，since“既然”在句子中引导原因状语从句。故选B。 22．________ 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。 23．________ 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。 24．________ 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。 25．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。 26．—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。 27．________ 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。 28．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。 29．—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。 30．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。 31．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。 32．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。 33．—Why was he late? —He was late ________ he was ill, not ________ the bad weather. A．because; because of B．because of; because C．because; because D．because; so 【答案】A 【详解】句意：——他为什么迟到了？——他迟到是因为他生病了，而不是因为糟糕的天气。 考查连词和介词短语。because因为，后接句子；because of因为，介词短语，后跟名词或名词短语；so所以。结合语境可知，答语表示原因，故排除选项D；第一空后为句子，故应用because；第二空后是名词短语，应用because of。故选A。 34．________ 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。 35．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。 36．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。 37．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。 38．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。 39．It was Sunday. _____ Marcus didn't need to go to school, he didn't get up until 9 a.m. A．Unless B．When C．Though D．As 【答案】D 【详解】句意：那是星期天，因为马库斯不需要上学，所以他直到早上9点才起床。A. Unless除非；B. When当…时；C. Though虽然；D. As因为。根据语境：星期天了。因为马库斯不需要上学，所以直到9点才起床。结合选项，显然选项D符合题意，故选D。 40．—She may need some help ________ she’s new here. —Let’s help her as much as possible. A．though B．unless C．while D．as 【答案】D 【详解】句意：——她是新来的，可能需要一些帮助。   ——让我们尽可能多地帮助她。 考查连词辨析。though虽然，尽管，引导让步状语从句；unless除非，引导条件状语从句；while当……的时候，引导时间状语从句；as因为，引导原因状语从句。分析句子结构可知，句子“she’s new here.”是前句“She may need some help ”的原因，因此用as引导。故选D。 2 同步新课程，周周有练习，月月有重点！ 5 同步新课程，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 7 The unknown world 重点语法：原因状语从句精讲精练 语法知识精讲 原因状语从句（Adverbial Clause of Reason）用于说明主句动作发生的原因，逻辑清晰，实用性强。掌握它的核心在于理解“因→果”关系，并正确使用连接词。 一、核心逻辑：连接词的选择 原因状语从句由特定的从属连词引导，不同连接词有细微区别： 1. because（最强语气） - 强调直接原因，回答“Why?” - 位置灵活，可放主句前（加逗号）或后。 - 例句： - He failed the exam because he didn’t study. （直接原因） - Because it was raining, we stayed at home. 2. since / as（较弱语气） - 表示已知的、显而易见的原因，常放句首。 - 区别： - since 稍正式，隐含“既然”（=now that）。 - as 多用于口语，原因更次要。 - 例句： - Since you’re tired, let’s take a break. （双方都知道“你累了”） - As it’s Sunday, the shop is closed. 3. for（补充说明，非直接原因） - 表推测性原因或附加解释，只能放主句后，前加逗号。 - 例句： - He must be ill, for he looks pale. （根据脸色“推测”生病） 二、逻辑对比：如何选择连接词？ 连接词 语气强度 位置 适用场景 because 最强 句首或句尾 直接原因，回答“为什么” since 中等 句首（常见 已知原因，类似“既然” as 较弱 句首 次要原因，口语化 for 最弱 句尾（加逗号） 补充解释，推测原因 三、易错点与注意事项 1. 不能与so连用： - ❌ Because he was ill, so he stayed home. （重复冗余） - ✅ Because he was ill, he stayed home. 或 He was ill, so he stayed home. 2. 时态一致性： - 主句和从句的时态通常一致（除非客观事实）。 - 例句： - He didn’t go to school because he had a fever. （过去一致） 3. 区分“because of”： - because + 句子，而 because of + 名词/代词。 - 对比： - He was late because the traffic was heavy. （从句） - He was late because of the heavy traffic. （短语） 语法知识精练 基础入门训练20题 1．________ we are young, we shouldn’t be too afraid of making mistakes. A．Though B．Since C．When D．If 2．It rained last night, ________ the ground is wet. A．or B．for C．but D．though 3．Mr. Black was late for work ________ his car didn’t work on the way, not ________ the bad weather. A．because, because of B．because of, because C．because, because D．because of, because of 4．Sally wants to buy a new shirt ________ hers is too old now. A．when B．where C．because D．how 5．I didn’t go to the supermarket ________ the weather was bad. A．so B．or C．but D．because 6．Read the sentence “I can tell her anything because she can keep a secret.” The underlined word “because” is used to __________. A．show time B．give examples C．make new words D．show cause and effect 7．Lucy didn’t put up her hand _________ she didn’t know the answer to the question. A．because B．though C．until D．but 8． Charlie is Mr.Dancer’s eyes,let them in at once. A．Though B．Before C．Now that D．When 9．________ all the guests are here, why don’t we begin the party at once? A．Although B．As soon as C．After D．Now that 10．______ it’s your first visit to Britain, you’d better not miss its famous museums. A．Now that B．Unless C．When D．Although 11．______ everyone is here, let’s start for the Science Museum. A．Though B．After C．Now that D．Before 12．We must set out earlier than yesterday, ________ we will travel eighty miles today. A．though B．so C．for D．when 13．The exam must be very difficult, ________ many students failed. A．though B．so C．for D．but 14．—As far as I know, Jane isn't used to working here. —Why not help her_______she's new? A．though B．until C．as D．if 15．—Shall I give you a ride ________ it is so late? —Thank you. It couldn’t be better. A．if B．until C．before D．as 16．________ he needed money for his marriage, he had to do a part-time job after work. A．As B．Though C．Because of D．So that 17．Jim found it difficult to see the blackboard clearly_______ his eyesight became worse. A．but B．so C．as D．although 18．________ we have no money, we can’t buy it. A．Until B．Unless C．As D．Although 19．—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 20．—________ you didn’t go to school without any reason, you should make an ________ to your teacher. —I am ready for it. A．Since; apology B．Since; excuse C．While; apology D．While; excuse 进阶拓展训练20题 21．—What shall we do now? — ________ it’s raining hard, let’s stay at home. A．So B．Since C．Though D．If 22．________ 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 23．________ everybody is here, let’s begin our class. A．Before B．Since C．On the one hand D．If 24．________ everyone will face trouble in their lives, why don’t we give a helping hand? A．Until B．When C．Since D．While 25．It’s important to keep learning about new ideas and technology ________ the world changes so fast. A．so B．or C．since D．unless 26．—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 27．________ everybody is here, let’s begin our class. A．Before B．Since C．So D．Although 28．Let’s stop to have a rest, ________ we all feel very tired. A．since B．unless C．so D．although 29．—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 30．I can’t fix the watch ________ I have no tools. A．because B．after C．and D．or 31．He didn’t go to school yesterday ________ he was ill. A．because B．so C．if D．because of 32．Jill’s mother can’t take her to the zoo ________ she has no time. A．because B．when C．if D．however 33．—Why was he late? —He was late ________ he was ill, not ________ the bad weather. A．because; because of B．because of; because C．because; because D．because; so 34．________ he thinks science is boring, ________ he doesn’t like it. A．Because; so B．Because; / C．So; / D．So; because 35．The boy was safe ________ the police came in time. A．because B．but C．or D．and 36．You shouldn’t listen to loud music ________ it may hurt your ears. A．because B．but C．so D．although 37．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 38．Tom felt unhappy, ________ he didn’t think his classmates liked him. A．though B．so C．unless D．because 39．It was Sunday. _____ Marcus didn't need to go to school, he didn't get up until 9 a.m. A．Unless B．When C．Though D．As 40．—She may need some help ________ she’s new here. —Let’s help her as much as possible. A．though B．unless C．while D．as 2 同步新课程，周周有练习，月月有重点！ 5 同步新课程，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$