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Module 3 语法Grammar 原因状语从句-九年级英语上册单元重难点易错题（外研版）
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这是一份Module 3 语法Grammar 原因状语从句-九年级英语上册单元重难点易错题（外研版），共15页。
班级 姓名 学号 分数
Module 3 Heroes
原因状语从句
（时间：60分钟，满分：100分）
一、单项选择(本大题共50小题，每小题2分，共100分)
1．（2022·江苏淮安·统考中考真题）We would like to buy electric cars ________ they produce less air pollution.
A．because B．so C．though D．but
2．（2022·辽宁沈阳·统考中考真题）I love going to school ________ everyone in my class is friendly.
A．before B．although C．because D．unless
3．（2022·内蒙古包头·统考中考真题）Many wild animals don’t have a safe place to live, ________ villages and farms are growing bigger and taking away their land.
A．because B．until C．although D．before
4．（2022·福建·统考中考真题）We are making a big cake ________ it’s Dad’s birthday today.
A．because B．until C．once
5．（2022·湖南怀化·统考中考真题）I want to buy something special for my grandmother, _______ her birthday is coming.
A．because B．although C．so
6．（2022·浙江温州·统考中考真题）—Mum, may I have more chocolate?
—You’d better not ________ too much sweet food is bad for health.
A．until B．while C．although D．because
7．（2023·安徽滁州·统考一模）Some students are spending more time at school, ________ schools are doing after-hours caretaking services.
A．because B．and C．so D．but
8．（2023·四川成都·统考二模）My brother and I never hurt the little animals on the street ________ they are our friends.
A．unless B．because C．or
9．（2023·江苏南京·统考二模）Nanjing Forest Music Festival is worth attending ________ it mixes traditional Chinese music and modern Western music.
A．while B．until C．whenever D．because
10．（2023·北京昌平·统考二模）We were very happy ________ we won the speech competition.
A．because B．but C．or D．so
11．（2023·北京·一模）—Tony, who is your favourite writer?
—Mark Twain. I like him _________ he wrote many interesting stories.
A．or B．so C．but D．because
12．（2023·河北唐山·统考二模）Many people prefer reading paper books ________ they are comfortable to read.
A．and B．but C．because D．so
13．（2023·重庆九龙坡·统考一模）We all like our Chinese teacher _________ she is kind and patient.
A．unless B．though C．whether D．because
14．（2023·天津河北·统考二模）David has painted his room blue _______ the colour brings peace to his mind and body.
A．although B．because C．before D．if
15．（2023·天津东丽·统考一模）We had to wait for Tom for half an hour ________ he was busy taking a training class.
A．so B．if C．before D．because
16．（2023·上海虹口·统考二模）John lost his way in the field, ________ the ground was covered with thick snow.
A．or B．for C．but D．so
17．（2021·四川成都·统考一模）He received the vaccine(疫苗) for COVID-19 ________ he will work abroad next month.
A．unless B．because C．while
18．（2021·黑龙江齐齐哈尔·统考一模）________ there are different customs in different countries, it’s necessary to learn them before going abroad to avoid trouble.
A．As B．Unless C．Although
19．（2021·天津津南·统考一模）History is my favourite subject ________ it’s very interesting.
A．though B．and C．because D．but
20．（2021·江西九江·校考一模）________ we have a few minutes to wait for the train, let’s have a cup of coffee.
A．Although B．Until C．Since D．Unless
21．（2021·云南昆明·统考一模）Uncle Li is afraid that the skill of sugar paintings will be lost in the future _______ few people make sugar paintings by hand.
A．until B．so C．although D．because
22．（2021·黑龙江哈尔滨·统考二模）________ throwing-away masks（一次性口罩）could become a serious environmental problem, we should use reusable cotton masks to reduce（减少）mask waste.
A．Although B．Since C．Unless
23．（2021·江苏扬州·校联考一模）At present,it is not easy for some students to get up early ________ they have too much homework to finish.
A．unless B．since C．as a result D．although
24．（2021·黑龙江哈尔滨·统考二模）—I like rain ________ it makes me feel cool and relaxed.
—So do I.
A．or B．so C．because
25．（2022·江苏扬州·校考二模）Protecting wildlife is without doubt an important part, ________ each animal on Earth has a role to play in the ecosystem.
A．since B．though C．unless D．if
26．（2021·上海崇明·统考二模）John missed the morning flight ________ he forgot to set the alarm and he got up very late.
A．though B．when C．if D．because
27．（2021·吉林长春·统考一模）Winter is beautiful, but I think spring is more beautiful ________ it can bring us hope.
A．unless B．because C．until D．when
28．（2022·天津·统考一模）Our school is tidy and clean, ________ we often do the cleaning.
A．or B．but C．although D．because
29．（2021·上海宝山·统考一模）Mary choose to find a job after graduation ________ she didn’t want to depend on her parents.
A．if B．although C．because D．unless
30．（2022·上海·模拟预测）Three players are now out of the team ________ they were injured last night.
A．though B．unless C．until D．because
31．（2021·江苏徐州·统考二模）________ everyone is here, let’s begin the party.
A．Since B．Though C．While D．Unless
32．（2023·广西南宁·统考一模）He walked slowly ________ he hurt his leg yesterday.
A．because B．if C．so
33．（2022·辽宁沈阳·统考二模）Not many pandas live in the wild ________ there is not enough food for them.
A．unless B．though C．until D．because
34．（2022·江苏无锡·无锡市蠡园中学校考二模）________ your father is well again, you no longer have anything to worry about.
A．Since B．Before C．Although D．While
35．（2023·北京·模拟预测）Nancy is happy ________ she has got a new idea for her history project.
A．because B．while C．if D．though
36．（2022·江苏镇江·统考二模）Many Chinese people are falling in love with camping ________ long-distance travel is becoming more difficult.
A．until B．although C．unless D．since
37．（2022·江苏常州·统考二模）________ you have finished most of your homework at school, you needn’t stay up late to do it.
A．Before B．Until C．Since D．When
38．（2022·北京昌平·统考二模）Ricky’s dream finally came true _______ he never gave up trying.
A．because B．although C．unless D．if
39．（2022·江苏扬州·统考一模）________ everything was going according to the plan, there was no need to worry.
A．Since B．Although C．Unless D．Before
40．（2023·江苏无锡·统考二模）_________ most people get news online, printed newspapers won’t disappear in a hurry.
A．Because B．Since C．Though D．Unless
41．（2022·辽宁沈阳·沈阳市雨田实验中学校考一模）Red ropes are usually used ________ red is a lucky colour for Chinese people.
A．until B．though C．unless D．because
42．（2022·安徽合肥·校联考三模）Nowadays, Chinese food is getting more and more popular _________ it is not only colorful but also tasty.
A．unless B．because C．although D．until
43．（2022·江西吉安·统考二模）—Did you hear the news about the opening of Ganzhou-Shenzhen high-speed railway on December 10th?
—Yes. I was excited about it ________ my parents can come back home in 1.5 hours.
A．until B．but C．although D．because
44．（2022·西藏拉萨·统考一模）Zha Xi didn’t go to school ________ he was ill.
A．because B．because of C．if D．so
45．（2022·福建厦门·校考二模）We didn’t enjoy the trip at all ________ the weather was awful.
A．although B．because C．unless
46．（2022·湖北恩施·统考一模）We didn’t enjoy the day ________ it rained heavily.
A．because B．though C．if
47．（2022·山东菏泽·统考三模）—Some of the students are nearsighted (近视的) ________ they spend too much time using mobile phones or playing online games.
—Yeah, I think school and government should make some rules about this.
A．when B．because C．though
48．（2022·黑龙江哈尔滨·哈尔滨市第十七中学校校考模拟预测）—I know so few words __________ I have never tried to keep new words in mind.
—Don’t be worried. It’s never too late to begin.
A．that B．because C．though
49．（2022·安徽芜湖·统考三模）Our school holds a reading festival on April 8th every year ________ it can encourage students to read more books.
A．although B．because C．unless D．until
50．（2022·福建福州·统考模拟预测）I didn’t accept his help ________ I wanted to have a try myself.
A．because B．though C．unless
参考答案：
1．A
【详解】句意：我们想买电动汽车，因为它们产生的空气污染更少。
考查连词辨析。because因为；so因此；though尽管；but但是。上文“想买电动汽车”和下文“电动汽车产生较少空气污染”之间是因果关系，前者是结果，后者表原因，故用because连接。故选A。
2．C
【详解】句意：我喜欢去上学，因为我班级的每个人都很友好。
考查连词辨析。before在……之前；although尽管；because因为；unless除非。“我班级的每个人都很友好”是解释喜欢去上学的原因，用because引导原因状语从句，故选C。
3．A
【详解】句意：很多野生动物没有安全的地方住，因为村子和农场正在逐渐扩大，夺走了它们栖息之地。
考查连词。because因为；until直到；although尽管；before在……之前。根据“don’t have a safe place to live”及“villages and farms are growing bigger and taking away their land”可知，后面的句子表达原因，用连词“because”。故选A。
4．A
【详解】句意：我们正制作一个巨大的蛋糕，因为今天是爸爸的生日。
考查连词。because因为；until直到；once一旦。根据“We are making a big cake”及“it’s Dad’s birthday today”，可知前后是因果关系，后面句子解释原因，用连词“because”连接。故选A。
5．A
【详解】句意：我想给我奶奶买点特别的东西，因为她的生日快到了。
考查连词。because因为；although虽然；so因此；空格前后句之间是因果关系，属于“前果后因”结构，应用because引导原因状语从句，故选A。
6．D
【详解】句意：——妈妈，我可以再多点巧克力吗？——你最好不要，因为太多的甜食对你的健康不好。
考查连词辨析。until直到；while当……时；although尽管；because因为。根据“You’d better not… too much sweet food is bad for health”可知，空格后是在解释不能多吃甜食的原因，用because引导原因状语从句，故选D。
7．A
【详解】句意：一些学生花更多的时间在学校，因为学校提供课后照顾服务。
考查连词辨析。because因为；and和；so因此；but但是。根据“Some students are spending more time at school”和“schools are doing after-hours caretaking services”可知，一些学生在学校停留的时间更长，是因为学校提供了课后照顾服务；前后句为因果关系，前果后因，应用because连接。故选A。
8．B
【详解】句意：我哥哥和我从不伤害街上的小动物，因为它们是我们的朋友。
考查词义辨析。 unless除非；because因为；or否则。根据“they are our friends”可知，后句是前句的理由，此处为because引导原因状语从句。故选B。
9．D
【详解】句意：南京森林音乐节是值得参加的，因为它融合了中国传统音乐和现代西方音乐。
考查连词辨析。while与……同时；until直到；whenever无论何时；because因为。根据“Nanjing Forest Music Festival is worth attending”和“it mixes traditional Chinese music and modern Western music”可知，前后句为因果关系，前果后因，应用because进行连接。故选D。
10．A
【详解】句意：我们很高兴，因为我们赢得了演讲比赛。
考查连词辨析。because因为；but但是；or或者；so所以。分析“We were very happy...we won the speech competition.”可知，前后两句是因果关系，前果后因，应用because引导原因状语从句。故选A。
11．D
【详解】句意：——Tony，你最喜欢的作家是谁？——马克·吐温。我喜欢他，因为他写了许多有趣的故事。
考查连词辨析。or或者；so因此；but但是；because因为。根据句意可知，“he wrote many interesting stories”是“I like him”的原因，所以空处用because引导原因状语从句。故选D。
12．C
【详解】句意：许多人更喜欢读纸质书，因为它们读起来很舒服。
考查连词辨析。and和；but但是；because因为；so因此。“they are comfortable to read”是许多人喜欢读纸质书的原因，前果后因，用because引导原因状语从句。故选C。
13．D
【详解】句意：我们所有人都很喜欢语文老师，因为她和蔼且有耐心。
考查从属连词辨析。unless除非；though虽然；whether是否；because因为。根据“We all like our Chinese teacher...she is kind and patient.”可知，所有人都喜欢语文老师的原因是她和蔼且有耐心，空处应是because，引导原因状语从句。故选D。
14．B
【详解】句意：大卫已经把他的房间刷成蓝色的了，因为那个颜色给他的身心带来了平静。
考查从属连词辨析。although尽管，虽然；because因为；before在……之前；if如果。根据“the colour brings peace to his mind and body”可知，那个颜色让他的身心平静下来是他把房间刷成蓝色的原因，应用because来引导原因状语从句。故选B。
15．D
【详解】句意：我们不得不等汤姆半个小时，因为他正忙于上培训班。
考查连词辨析。so所以；if如果；before在……之前；because因为。根据句意，可知我们之所以等了半小时，就是因为Tom忙于上培训班，两者为因果关系，故选D。
16．B
【详解】句意：约翰在田野里迷了路，因为地上覆盖着厚厚的积雪。
考查连词辨析。or或者；for因为；but但是；so因此。“the ground was covered with thick snow”是“John lost his way in the field”的原因，用for连接。故选B。
17．B
【详解】句意：因为他下个月将在国外工作，所以他接种了新型冠状病毒疫苗。
考查连词。unless除非；because因为；while当……时。根据语境可知，因为要到国外工作，所以他接种了新冠疫苗。故选B。
18．A
【详解】句意：因为不同的国家有不同的风俗习惯，所以有必要在出国前了解它们，避免麻烦。
考查连词辨析。As因为；Unless除非；Although尽管。因为不同国家的风俗习惯不同，所以出国前应该了解它们，故用as引导原因状语从句。故选A。
19．C
【详解】句意：历史是我最喜欢的科目，因为它很有趣。
考查连词。though虽然；and和；because因为；but但是；空格前后表达的是因果关系，属于“前果后因”型，应用because引导原因状语从句，故选C。
20．C
【详解】句意：由于我们还有几分钟等火车，让我们喝杯咖啡吧。
考查连词辨析。Although尽管，引导让步状语从句；Until直到，引导时间状语从句；Since既然，由于，引导原因状语从句；Unless除非，引导条件状语从句。分析语境可知，前半句是一个原因状语从句，空处表示“由于”。故选C。
21．D
【详解】句意：李大叔担心以后糖画的技艺会丢失，因为很少有人用手工做糖画。
考查连词。until直到；so因此；although虽然；because因为；空格前后句之间是因果关系，属于“前果后因”结构，此处应用because引导原因状语从句，故选D。
22．B
【详解】句意：因为一次性口罩会成为一个严重的环境问题，所以我们应该使用可重复使用的棉口罩来减少口罩的浪费。
考查连词辨析。Although既然；Since因为；Unless除非。根据“throwing-away masks（一次性口罩）could become a serious environmental problem”是“we should use reusable cotton masks to reduce（减少）mask waste.”的原因，可知此处应该用since。故选B。
23．B
【详解】句意：现在，有些学生起得早并不容易，因为他们有太多的作业要完成。
考查连词辨析。unless除非；since既然，自从；as a result结果；although尽管，虽然。根据“At present,it is not easy for some students to get up early”可知，和下文之间存在因果关系，故选B。
24．C
【详解】句意：——我喜欢下雨，因为它使我感到凉爽和放松。 ——我也一样。
考查连词辨析。or否则；so因此；because因为。根据“I like rain...it makes me feel cool and relaxed.”可知，前后是因果关系，“it makes me feel cool and relaxed”为原因，所以此处用连词because。故选C。
25．A
【详解】句意：保护野生动物无疑是一个重要的部分，因为地球上的每一种动物都在生态系统中扮演着重要的角色。
考查连词辨析。since因为；though尽管；unless除非；if如果。“Protecting wildlife is without doubt an important part”与“each animal on Earth has a role to play in the ecosystem”是因果关系，后是因，用since引导原因状语从句，故选A。
26．D
【详解】句意：约翰错过了早上的航班，因为他忘记设闹钟，而且起得很晚。
考查从属连词。though尽管，表让步；when当的时候，表时间；if如果，表条件；because因为，表原因。根据题干意“John missed the morning flight…he forgot to set the alarm and he got up very late”，可知前后是因果关系，需用because引导原因状语从句，故选D。
27．B
【详解】句意：冬天很美，但我觉得春天更美，因为它能给我们带来希望。
考查连词辨析。unless除非；because因为；until直到……；when当……时候。分析前后句句意，后句是前句动作发生的原因，故连词应用because。故选B。
28．D
【详解】句意：我们的学校干净又整洁，因为我们经常打扫卫生。
考查连词辨析。or或者，否则；but但是；although虽然，尽管；because因为，由于。根据“Our school is tidy and clean...we often do the cleaning.”可知，句子前后为因果关系，后半句是原因，用because引导原因状语从句。故选D。
29．C
【详解】句意：玛丽选择毕业之后找工作，因为她不想依靠她的父母。
考查连词。if如果；although虽然；because因为；unless除非。根据“she didn’t want to depend on her parents”可知句子讲述的是毕业之后找工作的原因，用连词“because”引导原因状语从句。故选C。
30．D
【详解】句意：三名队员因昨晚受伤而被开除出队。
考查连词辨析。though虽然；unless除非；until直到；because因为。后面“they were injured last night”是前面“Three players are now out of the team”的原因，前果后因。故选D。
31．A
【详解】句意：既然大家都来了，让我们开始晚会吧。
考查连词辨析。Since既然；Though尽管；While当……时候；Unless除非，如果不。根据两句话的关系可知，前面这句话表示原因，后面表示结果，这里应用Since引导原因状语从句。故选A。
32．A
【详解】句意：他走得很慢，因为他昨天伤了腿。
考查连词辨析。because因为；if如果；so因此。根据“he hurt his leg yesterday”可知腿受伤是走得慢的原因，前果后因，用because引导原因状语从句。故选A。
33．D
【详解】句意：没有多少熊猫生活在野外，因为它们没有足够的食物。
考查连词。unless除非；though虽然；until直到；because因为；空格前后是因果关系，属于“前果后因”结构，应用because引导原因状语从句，故选D。
34．A
【详解】句意：既然你父亲已经康复了，你再也没有什么可担心的了。
考查连词辨析。Since因为，既然；Before在……之前；Although尽管；While当……时。根据“you no longer have anything to worry about”可知，因为父亲已经康复了，所以不需要担心了；故选A。
35．A
【详解】句意：Nancy很开心，因为她对她的历史项目有了新的想法。
考查连词辨析。because因为；while当……时候；if如果；though虽然。分析语境可知，前后两句是因果关系，前果后因，用because引导原因状语从句。故选A。
36．D
【详解】句意：由于长途旅行变得越来越困难，许多中国人都爱上了露营。
考查连词辨析。until直到；although尽管；unless除非；since因为。根据“long-distance travel is becoming more difficult.”可知此句和上文之间存在因果关系，用连词since，故选D。
37．C
【详解】句意：既然你在学校已经完成了大部分作业，所以你不必熬夜做。
考查连词辨析。Before在……之前；Until直到；Since既然，因为；When当。根据“you have finished most of your homework at school, you needn’t stay up late to do it”可知前后两句是因果关系，前因后果，用since引导原因状语从句。故选C。
38．A
【详解】句意：Ricky的梦想终于实现了，因为他从不放弃尝试。
考查连词辨析。because因为；although尽管；unless除非；if如果。“he never gave up trying”是前面“Ricky’s dream finally came true”的原因，所以此处是because引导的原因状语从句。故选A。
39．A
【详解】句意：既然一切都在按计划进行，就没有必要担心了。
考查从属连词辨析。Since既然；Although尽管；Unless除非；Before以前。分析“...everything was going according to the plan, there was no need to worry.”可知，既然一切都在按计划进行，就没有必要担心了。since意为“既然”，引导原因状语从句。故选A。
40．C
【详解】句意：虽然大多数人在网上获得新闻，但纸质报纸不会很快消失。
考查连词辨析。because因为；since既然；though虽然；unless除非。“most people get news online”和“printed newspapers won’t disappear in a hurry”之间构成让步关系，用though引导让步状语从句。故选C。
41．D
【详解】句意：红色绳索通常被使用，因为红色对中国人来说是一种幸运的颜色。
考查从属连词辨析。until直到；though虽然；unless除非；because因为。根据“red is a lucky colour for Chinese people”可推断，中国人常用红绳的原因是红色对中国人是幸运的颜色，前后句构成因果关系，用“because”连接。故选D。
42．B
【详解】句意：如今，中国菜越来越受欢迎，因为它不仅颜色鲜艳而且味道鲜美。
考查连词辨析。unless除非；because因为；although尽管，虽然；until直到。根据“it is not only colorful but also tasty.”可知，此处是表示中国菜越来越受欢迎的原因，用because引导。故选B。
43．D
【详解】句意：——你听说了12月10日赣深高铁开通的消息了吗？——是的。我很兴奋，因为我的父母可以在一个半小时内回家。
考查连词辨析。until直到；but但是；although尽管；because因为。结合语境可知赣深高铁通车后，由于第二个人的父母在一个半小时内就能回家，所以第二个人很兴奋，用because引导原因状语从句。故选D。
44．A
【详解】句意：扎西没有去学校，因为他生病了。
考查连词辨析。because因为，后接句子；because of因为，后接名词性短语；if如果；so因此。根据“Zha Xi didn’t go to school”和“he was ill”可知，前后句为因果关系，后一句表示原因，且是从句，故应用because引导原因状语从句。故选A。
45．B
【详解】句意：我们一点也不喜欢这次旅行，因为天气很糟糕。
考查连词辨析。although尽管；because因为；unless除非。根据“We didn’t enjoy the trip at all..the weather was awful.”可知前后句是因果关系，应用because引导原因状语从句，故选B。
46．A
【详解】句意：我们不喜欢这一天，因为雨下得很大。
考查连词辨析。because因为；though虽然；if如果。根据“We didn’t enjoy the day … it rained heavily.”可知，不喜欢这一天的原因是雨下得很大，空格处应用because引导原因状语从句。故选A。
47．B
【详解】句意：——有些学生近视，因为他们花太多时间使用手机或玩网络游戏。——是的，我认为学校和政府应该对此制定一些规则。
考查连词辨析。when当……时候；because因为；though虽然，“they spend too much time using mobile phones or playing online games”是“Some of the students are nearsighted”的原因，所以用because引导原因状语从句，故选B。
48．B
【详解】句意：——我认识的单词很少，因为我从来没有试着把新单词记在心里。——不要担心。开始永远不晚。
考查从属连词辨析。that无实际含义；because因为；though虽然。“I have never tried to keep new words in mind”是“I know so few words”的原因，用because引导原因状语从句，故选B。
49．B
【详解】句意：我们学校每年4月8日举办读书节，因为它能鼓励学生们读更多的书。
考查连词辨析。although虽然；because因为；unless除非；until直到。我们学校每年4月8日都会举办读书节，“因为”它可以鼓励学生多读书，后句是前句的原因，用because引导原因状语从句。 故选B。
50．A
【详解】句意：我没有接受他的帮助，因为我想自己试一试。
考查从属连词辨析。because因为；though虽然；unless除非。“I wanted to have a try myself”是“I didn’t accept his help”的原因，用because引导原因状语从句，故选A。
班级 姓名 学号 分数
Module 3 Heroes
原因状语从句
（时间：60分钟，满分：100分）
一、单项选择(本大题共50小题，每小题2分，共100分)
1．（2022·江苏淮安·统考中考真题）We would like to buy electric cars ________ they produce less air pollution.
A．because B．so C．though D．but
2．（2022·辽宁沈阳·统考中考真题）I love going to school ________ everyone in my class is friendly.
A．before B．although C．because D．unless
3．（2022·内蒙古包头·统考中考真题）Many wild animals don’t have a safe place to live, ________ villages and farms are growing bigger and taking away their land.
A．because B．until C．although D．before
4．（2022·福建·统考中考真题）We are making a big cake ________ it’s Dad’s birthday today.
A．because B．until C．once
5．（2022·湖南怀化·统考中考真题）I want to buy something special for my grandmother, _______ her birthday is coming.
A．because B．although C．so
6．（2022·浙江温州·统考中考真题）—Mum, may I have more chocolate?
—You’d better not ________ too much sweet food is bad for health.
A．until B．while C．although D．because
7．（2023·安徽滁州·统考一模）Some students are spending more time at school, ________ schools are doing after-hours caretaking services.
A．because B．and C．so D．but
8．（2023·四川成都·统考二模）My brother and I never hurt the little animals on the street ________ they are our friends.
A．unless B．because C．or
9．（2023·江苏南京·统考二模）Nanjing Forest Music Festival is worth attending ________ it mixes traditional Chinese music and modern Western music.
A．while B．until C．whenever D．because
10．（2023·北京昌平·统考二模）We were very happy ________ we won the speech competition.
A．because B．but C．or D．so
11．（2023·北京·一模）—Tony, who is your favourite writer?
—Mark Twain. I like him _________ he wrote many interesting stories.
A．or B．so C．but D．because
12．（2023·河北唐山·统考二模）Many people prefer reading paper books ________ they are comfortable to read.
A．and B．but C．because D．so
13．（2023·重庆九龙坡·统考一模）We all like our Chinese teacher _________ she is kind and patient.
A．unless B．though C．whether D．because
14．（2023·天津河北·统考二模）David has painted his room blue _______ the colour brings peace to his mind and body.
A．although B．because C．before D．if
15．（2023·天津东丽·统考一模）We had to wait for Tom for half an hour ________ he was busy taking a training class.
A．so B．if C．before D．because
16．（2023·上海虹口·统考二模）John lost his way in the field, ________ the ground was covered with thick snow.
A．or B．for C．but D．so
17．（2021·四川成都·统考一模）He received the vaccine(疫苗) for COVID-19 ________ he will work abroad next month.
A．unless B．because C．while
18．（2021·黑龙江齐齐哈尔·统考一模）________ there are different customs in different countries, it’s necessary to learn them before going abroad to avoid trouble.
A．As B．Unless C．Although
19．（2021·天津津南·统考一模）History is my favourite subject ________ it’s very interesting.
A．though B．and C．because D．but
20．（2021·江西九江·校考一模）________ we have a few minutes to wait for the train, let’s have a cup of coffee.
A．Although B．Until C．Since D．Unless
21．（2021·云南昆明·统考一模）Uncle Li is afraid that the skill of sugar paintings will be lost in the future _______ few people make sugar paintings by hand.
A．until B．so C．although D．because
22．（2021·黑龙江哈尔滨·统考二模）________ throwing-away masks（一次性口罩）could become a serious environmental problem, we should use reusable cotton masks to reduce（减少）mask waste.
A．Although B．Since C．Unless
23．（2021·江苏扬州·校联考一模）At present,it is not easy for some students to get up early ________ they have too much homework to finish.
A．unless B．since C．as a result D．although
24．（2021·黑龙江哈尔滨·统考二模）—I like rain ________ it makes me feel cool and relaxed.
—So do I.
A．or B．so C．because
25．（2022·江苏扬州·校考二模）Protecting wildlife is without doubt an important part, ________ each animal on Earth has a role to play in the ecosystem.
A．since B．though C．unless D．if
26．（2021·上海崇明·统考二模）John missed the morning flight ________ he forgot to set the alarm and he got up very late.
A．though B．when C．if D．because
27．（2021·吉林长春·统考一模）Winter is beautiful, but I think spring is more beautiful ________ it can bring us hope.
A．unless B．because C．until D．when
28．（2022·天津·统考一模）Our school is tidy and clean, ________ we often do the cleaning.
A．or B．but C．although D．because
29．（2021·上海宝山·统考一模）Mary choose to find a job after graduation ________ she didn’t want to depend on her parents.
A．if B．although C．because D．unless
30．（2022·上海·模拟预测）Three players are now out of the team ________ they were injured last night.
A．though B．unless C．until D．because
31．（2021·江苏徐州·统考二模）________ everyone is here, let’s begin the party.
A．Since B．Though C．While D．Unless
32．（2023·广西南宁·统考一模）He walked slowly ________ he hurt his leg yesterday.
A．because B．if C．so
33．（2022·辽宁沈阳·统考二模）Not many pandas live in the wild ________ there is not enough food for them.
A．unless B．though C．until D．because
34．（2022·江苏无锡·无锡市蠡园中学校考二模）________ your father is well again, you no longer have anything to worry about.
A．Since B．Before C．Although D．While
35．（2023·北京·模拟预测）Nancy is happy ________ she has got a new idea for her history project.
A．because B．while C．if D．though
36．（2022·江苏镇江·统考二模）Many Chinese people are falling in love with camping ________ long-distance travel is becoming more difficult.
A．until B．although C．unless D．since
37．（2022·江苏常州·统考二模）________ you have finished most of your homework at school, you needn’t stay up late to do it.
A．Before B．Until C．Since D．When
38．（2022·北京昌平·统考二模）Ricky’s dream finally came true _______ he never gave up trying.
A．because B．although C．unless D．if
39．（2022·江苏扬州·统考一模）________ everything was going according to the plan, there was no need to worry.
A．Since B．Although C．Unless D．Before
40．（2023·江苏无锡·统考二模）_________ most people get news online, printed newspapers won’t disappear in a hurry.
A．Because B．Since C．Though D．Unless
41．（2022·辽宁沈阳·沈阳市雨田实验中学校考一模）Red ropes are usually used ________ red is a lucky colour for Chinese people.
A．until B．though C．unless D．because
42．（2022·安徽合肥·校联考三模）Nowadays, Chinese food is getting more and more popular _________ it is not only colorful but also tasty.
A．unless B．because C．although D．until
43．（2022·江西吉安·统考二模）—Did you hear the news about the opening of Ganzhou-Shenzhen high-speed railway on December 10th?
—Yes. I was excited about it ________ my parents can come back home in 1.5 hours.
A．until B．but C．although D．because
44．（2022·西藏拉萨·统考一模）Zha Xi didn’t go to school ________ he was ill.
A．because B．because of C．if D．so
45．（2022·福建厦门·校考二模）We didn’t enjoy the trip at all ________ the weather was awful.
A．although B．because C．unless
46．（2022·湖北恩施·统考一模）We didn’t enjoy the day ________ it rained heavily.
A．because B．though C．if
47．（2022·山东菏泽·统考三模）—Some of the students are nearsighted (近视的) ________ they spend too much time using mobile phones or playing online games.
—Yeah, I think school and government should make some rules about this.
A．when B．because C．though
48．（2022·黑龙江哈尔滨·哈尔滨市第十七中学校校考模拟预测）—I know so few words __________ I have never tried to keep new words in mind.
—Don’t be worried. It’s never too late to begin.
A．that B．because C．though
49．（2022·安徽芜湖·统考三模）Our school holds a reading festival on April 8th every year ________ it can encourage students to read more books.
A．although B．because C．unless D．until
50．（2022·福建福州·统考模拟预测）I didn’t accept his help ________ I wanted to have a try myself.
A．because B．though C．unless
参考答案：
1．A
【详解】句意：我们想买电动汽车，因为它们产生的空气污染更少。
考查连词辨析。because因为；so因此；though尽管；but但是。上文“想买电动汽车”和下文“电动汽车产生较少空气污染”之间是因果关系，前者是结果，后者表原因，故用because连接。故选A。
2．C
【详解】句意：我喜欢去上学，因为我班级的每个人都很友好。
考查连词辨析。before在……之前；although尽管；because因为；unless除非。“我班级的每个人都很友好”是解释喜欢去上学的原因，用because引导原因状语从句，故选C。
3．A
【详解】句意：很多野生动物没有安全的地方住，因为村子和农场正在逐渐扩大，夺走了它们栖息之地。
考查连词。because因为；until直到；although尽管；before在……之前。根据“don’t have a safe place to live”及“villages and farms are growing bigger and taking away their land”可知，后面的句子表达原因，用连词“because”。故选A。
4．A
【详解】句意：我们正制作一个巨大的蛋糕，因为今天是爸爸的生日。
考查连词。because因为；until直到；once一旦。根据“We are making a big cake”及“it’s Dad’s birthday today”，可知前后是因果关系，后面句子解释原因，用连词“because”连接。故选A。
5．A
【详解】句意：我想给我奶奶买点特别的东西，因为她的生日快到了。
考查连词。because因为；although虽然；so因此；空格前后句之间是因果关系，属于“前果后因”结构，应用because引导原因状语从句，故选A。
6．D
【详解】句意：——妈妈，我可以再多点巧克力吗？——你最好不要，因为太多的甜食对你的健康不好。
考查连词辨析。until直到；while当……时；although尽管；because因为。根据“You’d better not… too much sweet food is bad for health”可知，空格后是在解释不能多吃甜食的原因，用because引导原因状语从句，故选D。
7．A
【详解】句意：一些学生花更多的时间在学校，因为学校提供课后照顾服务。
考查连词辨析。because因为；and和；so因此；but但是。根据“Some students are spending more time at school”和“schools are doing after-hours caretaking services”可知，一些学生在学校停留的时间更长，是因为学校提供了课后照顾服务；前后句为因果关系，前果后因，应用because连接。故选A。
8．B
【详解】句意：我哥哥和我从不伤害街上的小动物，因为它们是我们的朋友。
考查词义辨析。 unless除非；because因为；or否则。根据“they are our friends”可知，后句是前句的理由，此处为because引导原因状语从句。故选B。
9．D
【详解】句意：南京森林音乐节是值得参加的，因为它融合了中国传统音乐和现代西方音乐。
考查连词辨析。while与……同时；until直到；whenever无论何时；because因为。根据“Nanjing Forest Music Festival is worth attending”和“it mixes traditional Chinese music and modern Western music”可知，前后句为因果关系，前果后因，应用because进行连接。故选D。
10．A
【详解】句意：我们很高兴，因为我们赢得了演讲比赛。
考查连词辨析。because因为；but但是；or或者；so所以。分析“We were very happy...we won the speech competition.”可知，前后两句是因果关系，前果后因，应用because引导原因状语从句。故选A。
11．D
【详解】句意：——Tony，你最喜欢的作家是谁？——马克·吐温。我喜欢他，因为他写了许多有趣的故事。
考查连词辨析。or或者；so因此；but但是；because因为。根据句意可知，“he wrote many interesting stories”是“I like him”的原因，所以空处用because引导原因状语从句。故选D。
12．C
【详解】句意：许多人更喜欢读纸质书，因为它们读起来很舒服。
考查连词辨析。and和；but但是；because因为；so因此。“they are comfortable to read”是许多人喜欢读纸质书的原因，前果后因，用because引导原因状语从句。故选C。
13．D
【详解】句意：我们所有人都很喜欢语文老师，因为她和蔼且有耐心。
考查从属连词辨析。unless除非；though虽然；whether是否；because因为。根据“We all like our Chinese teacher...she is kind and patient.”可知，所有人都喜欢语文老师的原因是她和蔼且有耐心，空处应是because，引导原因状语从句。故选D。
14．B
【详解】句意：大卫已经把他的房间刷成蓝色的了，因为那个颜色给他的身心带来了平静。
考查从属连词辨析。although尽管，虽然；because因为；before在……之前；if如果。根据“the colour brings peace to his mind and body”可知，那个颜色让他的身心平静下来是他把房间刷成蓝色的原因，应用because来引导原因状语从句。故选B。
15．D
【详解】句意：我们不得不等汤姆半个小时，因为他正忙于上培训班。
考查连词辨析。so所以；if如果；before在……之前；because因为。根据句意，可知我们之所以等了半小时，就是因为Tom忙于上培训班，两者为因果关系，故选D。
16．B
【详解】句意：约翰在田野里迷了路，因为地上覆盖着厚厚的积雪。
考查连词辨析。or或者；for因为；but但是；so因此。“the ground was covered with thick snow”是“John lost his way in the field”的原因，用for连接。故选B。
17．B
【详解】句意：因为他下个月将在国外工作，所以他接种了新型冠状病毒疫苗。
考查连词。unless除非；because因为；while当……时。根据语境可知，因为要到国外工作，所以他接种了新冠疫苗。故选B。
18．A
【详解】句意：因为不同的国家有不同的风俗习惯，所以有必要在出国前了解它们，避免麻烦。
考查连词辨析。As因为；Unless除非；Although尽管。因为不同国家的风俗习惯不同，所以出国前应该了解它们，故用as引导原因状语从句。故选A。
19．C
【详解】句意：历史是我最喜欢的科目，因为它很有趣。
考查连词。though虽然；and和；because因为；but但是；空格前后表达的是因果关系，属于“前果后因”型，应用because引导原因状语从句，故选C。
20．C
【详解】句意：由于我们还有几分钟等火车，让我们喝杯咖啡吧。
考查连词辨析。Although尽管，引导让步状语从句；Until直到，引导时间状语从句；Since既然，由于，引导原因状语从句；Unless除非，引导条件状语从句。分析语境可知，前半句是一个原因状语从句，空处表示“由于”。故选C。
21．D
【详解】句意：李大叔担心以后糖画的技艺会丢失，因为很少有人用手工做糖画。
考查连词。until直到；so因此；although虽然；because因为；空格前后句之间是因果关系，属于“前果后因”结构，此处应用because引导原因状语从句，故选D。
22．B
【详解】句意：因为一次性口罩会成为一个严重的环境问题，所以我们应该使用可重复使用的棉口罩来减少口罩的浪费。
考查连词辨析。Although既然；Since因为；Unless除非。根据“throwing-away masks（一次性口罩）could become a serious environmental problem”是“we should use reusable cotton masks to reduce（减少）mask waste.”的原因，可知此处应该用since。故选B。
23．B
【详解】句意：现在，有些学生起得早并不容易，因为他们有太多的作业要完成。
考查连词辨析。unless除非；since既然，自从；as a result结果；although尽管，虽然。根据“At present,it is not easy for some students to get up early”可知，和下文之间存在因果关系，故选B。
24．C
【详解】句意：——我喜欢下雨，因为它使我感到凉爽和放松。 ——我也一样。
考查连词辨析。or否则；so因此；because因为。根据“I like rain...it makes me feel cool and relaxed.”可知，前后是因果关系，“it makes me feel cool and relaxed”为原因，所以此处用连词because。故选C。
25．A
【详解】句意：保护野生动物无疑是一个重要的部分，因为地球上的每一种动物都在生态系统中扮演着重要的角色。
考查连词辨析。since因为；though尽管；unless除非；if如果。“Protecting wildlife is without doubt an important part”与“each animal on Earth has a role to play in the ecosystem”是因果关系，后是因，用since引导原因状语从句，故选A。
26．D
【详解】句意：约翰错过了早上的航班，因为他忘记设闹钟，而且起得很晚。
考查从属连词。though尽管，表让步；when当的时候，表时间；if如果，表条件；because因为，表原因。根据题干意“John missed the morning flight…he forgot to set the alarm and he got up very late”，可知前后是因果关系，需用because引导原因状语从句，故选D。
27．B
【详解】句意：冬天很美，但我觉得春天更美，因为它能给我们带来希望。
考查连词辨析。unless除非；because因为；until直到……；when当……时候。分析前后句句意，后句是前句动作发生的原因，故连词应用because。故选B。
28．D
【详解】句意：我们的学校干净又整洁，因为我们经常打扫卫生。
考查连词辨析。or或者，否则；but但是；although虽然，尽管；because因为，由于。根据“Our school is tidy and clean...we often do the cleaning.”可知，句子前后为因果关系，后半句是原因，用because引导原因状语从句。故选D。
29．C
【详解】句意：玛丽选择毕业之后找工作，因为她不想依靠她的父母。
考查连词。if如果；although虽然；because因为；unless除非。根据“she didn’t want to depend on her parents”可知句子讲述的是毕业之后找工作的原因，用连词“because”引导原因状语从句。故选C。
30．D
【详解】句意：三名队员因昨晚受伤而被开除出队。
考查连词辨析。though虽然；unless除非；until直到；because因为。后面“they were injured last night”是前面“Three players are now out of the team”的原因，前果后因。故选D。
31．A
【详解】句意：既然大家都来了，让我们开始晚会吧。
考查连词辨析。Since既然；Though尽管；While当……时候；Unless除非，如果不。根据两句话的关系可知，前面这句话表示原因，后面表示结果，这里应用Since引导原因状语从句。故选A。
32．A
【详解】句意：他走得很慢，因为他昨天伤了腿。
考查连词辨析。because因为；if如果；so因此。根据“he hurt his leg yesterday”可知腿受伤是走得慢的原因，前果后因，用because引导原因状语从句。故选A。
33．D
【详解】句意：没有多少熊猫生活在野外，因为它们没有足够的食物。
考查连词。unless除非；though虽然；until直到；because因为；空格前后是因果关系，属于“前果后因”结构，应用because引导原因状语从句，故选D。
34．A
【详解】句意：既然你父亲已经康复了，你再也没有什么可担心的了。
考查连词辨析。Since因为，既然；Before在……之前；Although尽管；While当……时。根据“you no longer have anything to worry about”可知，因为父亲已经康复了，所以不需要担心了；故选A。
35．A
【详解】句意：Nancy很开心，因为她对她的历史项目有了新的想法。
考查连词辨析。because因为；while当……时候；if如果；though虽然。分析语境可知，前后两句是因果关系，前果后因，用because引导原因状语从句。故选A。
36．D
【详解】句意：由于长途旅行变得越来越困难，许多中国人都爱上了露营。
考查连词辨析。until直到；although尽管；unless除非；since因为。根据“long-distance travel is becoming more difficult.”可知此句和上文之间存在因果关系，用连词since，故选D。
37．C
【详解】句意：既然你在学校已经完成了大部分作业，所以你不必熬夜做。
考查连词辨析。Before在……之前；Until直到；Since既然，因为；When当。根据“you have finished most of your homework at school, you needn’t stay up late to do it”可知前后两句是因果关系，前因后果，用since引导原因状语从句。故选C。
38．A
【详解】句意：Ricky的梦想终于实现了，因为他从不放弃尝试。
考查连词辨析。because因为；although尽管；unless除非；if如果。“he never gave up trying”是前面“Ricky’s dream finally came true”的原因，所以此处是because引导的原因状语从句。故选A。
39．A
【详解】句意：既然一切都在按计划进行，就没有必要担心了。
考查从属连词辨析。Since既然；Although尽管；Unless除非；Before以前。分析“...everything was going according to the plan, there was no need to worry.”可知，既然一切都在按计划进行，就没有必要担心了。since意为“既然”，引导原因状语从句。故选A。
40．C
【详解】句意：虽然大多数人在网上获得新闻，但纸质报纸不会很快消失。
考查连词辨析。because因为；since既然；though虽然；unless除非。“most people get news online”和“printed newspapers won’t disappear in a hurry”之间构成让步关系，用though引导让步状语从句。故选C。
41．D
【详解】句意：红色绳索通常被使用，因为红色对中国人来说是一种幸运的颜色。
考查从属连词辨析。until直到；though虽然；unless除非；because因为。根据“red is a lucky colour for Chinese people”可推断，中国人常用红绳的原因是红色对中国人是幸运的颜色，前后句构成因果关系，用“because”连接。故选D。
42．B
【详解】句意：如今，中国菜越来越受欢迎，因为它不仅颜色鲜艳而且味道鲜美。
考查连词辨析。unless除非；because因为；although尽管，虽然；until直到。根据“it is not only colorful but also tasty.”可知，此处是表示中国菜越来越受欢迎的原因，用because引导。故选B。
43．D
【详解】句意：——你听说了12月10日赣深高铁开通的消息了吗？——是的。我很兴奋，因为我的父母可以在一个半小时内回家。
考查连词辨析。until直到；but但是；although尽管；because因为。结合语境可知赣深高铁通车后，由于第二个人的父母在一个半小时内就能回家，所以第二个人很兴奋，用because引导原因状语从句。故选D。
44．A
【详解】句意：扎西没有去学校，因为他生病了。
考查连词辨析。because因为，后接句子；because of因为，后接名词性短语；if如果；so因此。根据“Zha Xi didn’t go to school”和“he was ill”可知，前后句为因果关系，后一句表示原因，且是从句，故应用because引导原因状语从句。故选A。
45．B
【详解】句意：我们一点也不喜欢这次旅行，因为天气很糟糕。
考查连词辨析。although尽管；because因为；unless除非。根据“We didn’t enjoy the trip at all..the weather was awful.”可知前后句是因果关系，应用because引导原因状语从句，故选B。
46．A
【详解】句意：我们不喜欢这一天，因为雨下得很大。
考查连词辨析。because因为；though虽然；if如果。根据“We didn’t enjoy the day … it rained heavily.”可知，不喜欢这一天的原因是雨下得很大，空格处应用because引导原因状语从句。故选A。
47．B
【详解】句意：——有些学生近视，因为他们花太多时间使用手机或玩网络游戏。——是的，我认为学校和政府应该对此制定一些规则。
考查连词辨析。when当……时候；because因为；though虽然，“they spend too much time using mobile phones or playing online games”是“Some of the students are nearsighted”的原因，所以用because引导原因状语从句，故选B。
48．B
【详解】句意：——我认识的单词很少，因为我从来没有试着把新单词记在心里。——不要担心。开始永远不晚。
考查从属连词辨析。that无实际含义；because因为；though虽然。“I have never tried to keep new words in mind”是“I know so few words”的原因，用because引导原因状语从句，故选B。
49．B
【详解】句意：我们学校每年4月8日举办读书节，因为它能鼓励学生们读更多的书。
考查连词辨析。although虽然；because因为；unless除非；until直到。我们学校每年4月8日都会举办读书节，“因为”它可以鼓励学生多读书，后句是前句的原因，用because引导原因状语从句。 故选B。
50．A
【详解】句意：我没有接受他的帮助，因为我想自己试一试。
考查从属连词辨析。because因为；though虽然；unless除非。“I wanted to have a try myself”是“I didn’t accept his help”的原因，用because引导原因状语从句，故选A。
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