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原因状语从句
原因状语从句的引导词有because，since，as等。
注意：1. because和s不能同时使用。
如：He didn’t cme t schl 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 everyne is here, let’s start.既然大家都到期了，我们就开始吧。
1．（2023·江苏南通中考真题）________ yu can’t wrk ut the prblem, perhaps yu need t ask yur classmates fr help.
A．UnlessB．ThughC．SinceD．Whether
2．（2022·江苏淮安·统考中考真题）We wuld like t buy electric cars ________ they prduce less air pllutin.
A．becauseB．sC．thughD．but
3．（2023·江苏镇江·统考二模）—It’s said that Zhenjiang Pt Cver Ndles are very delicius.
—Well, ________ we are here, why nt have a try?
A．thughB．unlessC．sinceD．befre
4．（2023·江苏扬州·校考二模）Rad salt is cmmnly used t clear the snw n rads during winter ______ it makes it harder fr water and snw t freeze.
A．thughB．becauseC．ifD．unless
5．（2023·江苏南京·统考二模）Nanjing Frest Music Festival is wrth attending ________ it mixes traditinal Chinese music and mdern Western music.
A．whileB．untilC．wheneverD．because
6．（2023·江苏扬州·统考一模）—I hear that yu have lived in Yangzhu since yu gt married.
—That’s true. ________ the cst f living in Yangzhu is amng the lwest in Jiangsu Prvince, peple live there cmfrtably and happily.
A．SinceB．WhenC．AlthughD．Unless
7．（2023·江苏无锡·统考一模）The curse f life never runs smthly ________ it is full f ups and dwns.
A．thughB．sinceC．whileD．unless
8．（2022·江苏无锡·模拟预测）Life is like a ne-way race, s treasure every mment ________ time cannt be wn again.
A．sB．asC．ifD．unless
9．（2022上·江苏南通·九年级统考期末）—It’s said that Beijing Duck is very famus and delicius.
—Well, _______ we’re here, why nt g t the restaurant and rder sme?
A．unlessB．thughC．wheneverD．since
10．（2022上·江苏盐城·九年级校联考阶段练习）________ everyne is here, let’s begin ur meeting.
A．UnlessB．SinceC．AlthughD．When
11．（2022上·江苏淮安·九年级统考期末）—Why d yu like listening t music?
—________ it makes me feel relaxed.
A．Because fB．BecauseC．SinceD．As
12．（2022上·江苏南通·九年级校考阶段练习）—Yu recmmend me t wear an range shirt tday, right?
—Yes. ________ range can bring yu gd luck, it is gd fr yur interview.
A．AsB．WhenC．IfD．While
13．（2022·江苏镇江·统考二模）Many Chinese peple are falling in lve with camping ________ lng-distance travel is becming mre difficult.
A．untilB．althughC．unlessD．since
14．（2022·江苏盐城·统考一模）Sme students had t give up their hbbies ________ they were busy with their schl wrk.
A．whileB．becauseC．thughD．until
15．（2023·江苏徐州·校考三模）—Indian street fd may taste a bit strange.
—Well, we are here, why nt give it a try?
A．ifB．althughC．unlessD．since
1．C
【详解】句意：既然你解不出这道题，也许你需要向你的同学求助。
考查连词辨析。Unless除非；Thugh尽管；Since既然，由于；Whether是否。“yu can’t wrk ut the prblem”是向同学求助的原因，用Since引导原因状语从句。故选C。
2．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；s因此；thugh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。
3．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。thugh尽管；unless除非；since既然；befre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。
4．B
【详解】句意：在冬季，道路盐通常用于清除道路上的积雪，因为它会使水和雪更难结冰。
考查连词。thugh尽管，表示转折；because因为，表原因；if如果，表示条件关系；unless除非，表示否定条件关系。根据“Rad salt is cmmnly used t clear the snw n rads during winter”和“it makes it harder fr water and snw t freeze”可知，前后句是因果关系。故选B。
5．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 Frest Music Festival is wrth attending”和“it mixes traditinal Chinese music and mdern 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。
6．A
【详解】句意：——我听说你结婚后一直住在扬州。——这是真的。由于扬州是江苏省生活成本最低的城市之一，人们在那里生活得舒适而快乐。
考查连词辨析。Since因为，由于；When当……时；Althugh尽管；Unless除非。分析语境可知，“扬州是江苏省生活成本最低的城市之一”是“人们在那里生活得舒适而快乐”的原因，故用Since引导原因状语从句。故选A。
7．B
【详解】句意：人生之路从不一帆风顺，因为它充满了起伏。
考查连词。thugh虽然；since因为；while然而；unless除非。根据“The curse f life never runs is full f ups and dwns.”可知，此空应是since，引导原因状语从句，表示因为人生充满了起伏，所以人生之路从来都不是一帆风顺的。故选B。
8．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。s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。
9．D
【详解】句意：——据说北京烤鸭很有名，很好吃。——好吧，既然我们在这里，为什么不去餐馆点一些呢？
考查连词辨析。unless除非；thugh尽管；whenever无论何时；since既然。根据“’re here, why nt g t the restaurant and rder sme”可知，“我们在这里”是“点餐”的原因，since引导原因状语从句。故选D。
10．B
【详解】句意：既然大家都到齐了，我们开始开会吧。
考查连词辨析。Unless除非；Since既然；Althugh尽管；When当……时。根据“... everyne is here, let’s begin ur meeting.”可知，既然所有人都在这里，那我们开始会议，since符合语境，引导原因状语从句。故选B。
11．B
【详解】句意：——你为什么喜欢听音乐？——因为它让我感到放松。
考查从属连词。Because f因为，后跟短语；Because因为，后跟句子；Since既然；As由于。根据“Why d yu like listening t music? ”可知，Why提问的特殊疑问句询问原因，需要使用Because回答。故选B。
12．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“range can bring yu gd luck, it is gd fr yur 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。
13．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；althugh尽管；unless除非；since因为。根据“lng-distance travel is becming mre difficult.”可知此句和上文之间存在因果关系，用连词since，故选D。
14．B
【详解】句意：一些学生不得不放弃他们的爱好，因为他们忙于学业。
考查连词辨析。while在……期间；because因为；thugh尽管；until直到……为止。根据“Sme students had t give up their hbbies”可知，学生放弃了爱好，是因为他们忙于学业。故选B。
15．D
【详解】句意：——印度街头食物可能尝起来有点怪。——嗯，既然我们在这儿，为什么不试一试。
考查连词。if如果；althugh虽然；unless除非；since既然。分析句子可知，横线上的词引导后面的原因状语从句，所以是since。故选D。
二、完成句子
16．（2023·江苏常州·校考二模）露西昨天缺席了会议，因为她的车抛锚了。
Lucy yesterday.
17．（2023·江苏常州·常州市北环中学校考一模）既然这个项目很有价值，为何不尽快开展呢？
Why dn’t yu it is f great value?
18．（2022·江苏常州·校联考一模）因为Jim犯的错误比其他任何一个学生少，所以老师表扬了他。
The teacher praised Jim .
19．（2022·江苏常州·校考二模）既然这个项目很有价值，为何不尽快开展呢？
Why dn’t yu ?
20．（2017·江苏淮安·统考中考真题）因为太多的工作，昨天晚上我妈妈不得不熬夜。
Last night, my mther stay up late t much wrk.
16．was absent frm the meeting because her car brke dwn
【详解】“缺席”be absent frm；“会议”the meeting；“因为”because；“她的车”her car；“抛锚”break dwn。根据“yesterday”可知用一般过去时。故填was absent frm the meeting because her car brke dwn。
17．carry ut the prject as sn as pssible since
【详解】carry ut“实施，开展”，the prject“这个项目”；as sn as pssible“尽快”；since“既然”，引导原因状语从句，固定句式：Why dn’t yu d sth“你为什么不做某事”，故填carry ut the prject as sn as pssible since。
18．because he made fewer mistakes than any ther student
【详解】because“因为”，引导原因状语从句；he“他”，作主语，指代Jim；make fewer mistakes“犯更少的错误”，fewer修饰可数名词复数；than“比”；any ther student“其他任何一个学生”，any ther修饰可数名词单数；根据“praised”可知，时态是一般过去时，谓语动词make变为过去式made。故填because he made fewer mistakes than any ther student。
19．carry ut the prject as sn as pssible since it is f great value
【详解】why dn’t yu d sth“你为什么不做某事”，carry ut“开展”， the prject“这个项目”，as sn as pssible“尽快”，since“既然” ，be f great value“很有价值”；根据汉意可知，since引导的原因状语从句为一般现在时，主语为it，be动词用is。故填carry ut the prject as sn as pssible since it is f great value。
20． had t because f/because she had/because she did
【详解】根据“Last night”可知用一般过去时。不得不have t；因为太多的工作because f t much wrk/because she had t much wrk/because she did t much wrk。故填had t；because f/because she had/because she did。

三、完形填空
（2023·江苏盐城·统考中考真题）阅读下面短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。
It was New Year’s Eve. A cuple were decrating their rm when the man said t his wife, “I’m glad this year finishes in a few 21 . What a terrible year we’ve had!”
His wife asked him, “Why? I dn’t understand!” The man was very 22 and replied, “Yu dn’t understand? Think abut what has happened this year. First f all, I had a(n) 23 t remve my kidney(肾脏). Remember? Last mnth, I turned 24 and I was tld t make rm fr smene yunger. Huh! What am I ging t d nw? And yu surely haven’t frgtten the 25 , which made ur sn stay in hspital fr three weeks, have yu? And that mean he 26 take his exams t get int medical schl. And we had t buy a new car. 27 year! I’m s glad it’s ver.”
His wife didn’t say much. She 28 the rm. A few minutes later, she came back in and said, “OK, I heard what yu said, but this is 29 I see things. Yur kidney had been 30 yu fr years and yu wn’t have that pain ever again. Nw that yu dn’t have t g t wrk, yu can spend mre time in the 31 , taking better care f yur flwers. And that is the 32 yu’ve always wanted. Althugh the car was destryed, ur sn stayed 33 . He’ll d even better in his exams next year since he’s gt mre time t 34 . S I think it’s a gd year, and the new ne will start in a few hurs. I’m sure it’ll be anther gd year.”
We can’t cntrl the things that happen t us, but we can 35 hw we lk at them. Whatever happens, yu can be ptimistic r nt—it’s up t yu.
21．A．mnthsB．weeksC．daysD．hurs
22．A．interestedB．stressedC．surprisedD．tuched
23．A．abilityB．rightC．chanceD．peratin
24．A．leaveB．changeC．cntinueD．start
25．A．carB．examC．accidentD．medicine
26．A．culdn’tB．shuldn’tC．mustn’tD．needn’t
27．A．WnderfulB．TerribleC．StrangeD．Cmmn
28．A．went back intB．lked back intC．lked ut fD．went ut f
29．A．hwB．whyC．whenD．where
30．A．prtectingB．satisfyingC．wrryingD．relaxing
31．A．gardenB．kitchenC．hspitalD．schl
32．A．wrkB．lifeC．tripD．gift
33．A．calmB．silentC．aliveD．alne
34．A．playB．studyC．sleepD．exercise
35．A．cpyB．cntrlC．explainD．express
21．D 22．C 23．D 24．A 25．C 26．A 27．B 28．D 29．A 30．C 31．A 32．B 33．C 34．B 35．D
【导语】本文讲述了丈夫与妻子对即将过去的一年的不同的看法，由此告诉我们：生活中的一些事情，我们无法控制，但是我们可以控制自己对事物的看法，要乐观向上的生活。
21．句意：我很高兴这一年还有几个小时就要结束了。
mnths月份；weeks周；days天；hurs小时。根据“It was New Year’s Eve. A cuple were decrating their rm”以及“and the new ne will start in a few hurs”可知，在除夕夜应该是还有几个小时就过新年了，过去的一年就要结束了，故选D。
22．句意：男人非常惊讶。
interested感兴趣的；stressed紧张的，焦虑的；surprised惊讶的；tuched感动的。根据“Yu dn’t understand? Think abut what has happened this year.”可知，妻子不懂丈夫说的话，丈夫感到惊讶，故选C。
23．句意：首先，我做了一个肾脏切除手术。
ability能力；right权力；chance机会；peratin手术。根据“t remve my kidney(肾脏)”可知，男子做了手术，故选D。
24．句意：上个月，我离职了，被告知要给更年轻的人让位。
leave离开；change改变；cntinue继续；start开始。根据“I was tld t make rm fr smene yunger.”可知，此处是说“离开了工作岗位”，故选A。
25．句意：你肯定没有忘记那场事故。
car汽车；exam考试；accident事故；medicine药。根据“which made ur sn stay in hspital fr three weeks”可知，此处指的是“事故”，故选C。
26．句意：这意味着他不能参加考试，进入医学院。
culdn’t不能；shuldn’t不应该；mustn’t禁止；needn’t不需要。根据“And that mean his exams t get int medical schl.”可知，住院了不能参加考试，故选A。
27．句意：糟糕的一年！
Wnderful精彩的；Terrible糟糕的；Strange奇怪的；Cmmn普通的。根据上文的描述可知，这一年过得很糟糕，故选B。
28．句意：她走出房间。
went back int重新进入；lked back int回顾，回忆过去；lked ut f从……朝外看；went ut f走出。根据“A few minutes later, she came back in and said”可知，妻子走出了房间，故选D。
29．句意：好吧，我听到你说的了，但我就是这么看的。
hw怎样；why为什么；when何时；where哪里。根据“Yur kidney had fr years and yu wn’t have that pain ever again...”及“hw we lk at them”后文的解释可知，此处是妻子说明自己是如何看待这些事情的，故选A。
30．句意：你的肾脏多年来一直让你担心。
prtecting保护；satisfying满意；wrrying担心；relaxing放松。根据“yu wn’t have that pain ever again.”可知，男子的肾脏多年来一直让他担忧，故选C。
31．句意：现在你不用上班了，你可以花更多的时间在花园里，更好地照顾你的花。
garden花园；kitchen厨房；hspital医院；schl学校。根据“taking better care f yur flwers”可知，花应该是长在花园里，故选A。
32．句意：这就是你一直想要的生活。
wrk工作；life生活；trip旅行；gift礼物。根据“yu dn’t have t g t wrk, yu can spend mre time in better care f yur flwers”可知，这是丈夫想要的生活，故选B。
33．句意：虽然汽车被毁了，但我们的儿子还活着。
calm镇静的；silent沉默的；alive活着的；alne独自。根据“ Althugh the car was destryed, ur sn stayed...”可知，事故导致汽车毁了，但是儿子还活着，故选C。
34．句意：他明年的考试会考得更好，因为他有更多的时间学习。
play玩；study学习；sleep睡觉；exercise锻炼。根据“He’ll d even better in his exams next year since he’s gt mre time t...”可知，有更多的时间学习，所以明年会考得更好，故选B。
35．句意：我们不能控制发生在我们身上的事情，但我们可以表达我们如何看待它们。
cpy复制；cntrl控制；explain解释；express表达。根据“We can’t cntrl the things that happen t us, but we we lk at them.”可知，不能控制一些事情的发生，但是可以表达看待它的方式，故选D。
四、阅读理解
（2023·江苏盐城·统考中考真题）A team f Chinese scientists and climbers reached the tp f Qmlangma at abut 12:30 p.m. n Tuesday, May 23. It’s the secnd time since last year fr the science expeditin (考察) team t reach the tp.
The team was made up f 13 Chinese scientists and climbers. They set ff at a height f 8,300 metres fr the tp at abut 3 a.m. After mre than 8 hurs f hard climbing, they arrived at the 8,830-metre weather statin.
After fixing steel rpes, changing batteries and putting in wind speed and directin sensrs (传感器), they finished imprving the wrld’s highest autmated(自动化的) weather statin, which was setup by Chinese scientists last year. Besides, they cllected ice-snw samples n the tp fr further research.
The weather statin recrds temperatures, wind speeds and ther key data fr studying climate change. Climate scientists have fund that glbal warming has had a large influence n the glacier number n the Qinghai-Tibet Plateau (青藏高原).
Over the last fifty years, the temperature n the Qinghai-Tibet Plateau has risen abut 0.5℃ every ten years. Studying the ecsystem(生态系统) f the Qinghai-Tibet Plateau will help scientists have a better understanding f the influence f climate change, and help scientists and the gvernment make prper decisins.
Since the mid-20th century, China has sent different research expeditin teams t Qmlangma. But because f limited resurces and technlgies, many key scientific questins are still unanswered, such as whether glbal warming can melt the ice at the tp f Qmlangma, and hw ecsystem can change as height increases t extremity.
36．Hw many times has the Chinese science expeditin team reached the tp since last year?
A．Once.B．Twice.C．Three times.D．Fur times.
37．Which paragraph best describes the picture belw?
A．Paragraph 1.B．Paragraph 2.C．Paragraph 3.D．Paragraph 4.
38．What des Paragraph 5 mainly talk abut?
A．The way f scientists studying climate change.
B．The effrt f gvernment t slve climate change.
C．The influence f climate change n the Qinghai-Tibet Plateau.
D．The imprtance f studying ecsystem f the Qinghai-Tibet Plateau.
39．What can we knw frm the passage?
A．The team set f fat a height f 8,830 metres fr the tp at abut 3 a.m.
B．The team cllected rck samples n the tp fr further research.
C．China has setup the wrld's highest autmated weather statin s far.
D．All the key scientific questins have been answered up t nw.
36．B 37．B 38．D 39．C
【导语】本文主要讲述了中国科学家利用气象站去研究珠穆朗玛峰的气候变化情况以及全球变暖对青藏高原的影响。
36．细节理解题。根据“ It’s the secnd time since last year fr the science expeditin (考察) team t reach the tp.”可知，自去年以来，中国科学考察队登顶了两次，故选B。
37．推理判断题题。根据图片的展示可知，图片展示的是科学家和登山者到达气象站的情况，与第二段表达的内容一致，故选B。
38．段落大意题。根据“Over the last fifty years, the temperature n the Qinghai-Tibet Plateau has risen abut 0.5℃ every ten years. Studying the ecsystem(生态系统) f the Qinghai-Tibet Plateau will help scientists have a better understanding f the influence f climate change, and help scientists and the gvernment make prper decisins.”可知，本段主要是介绍研究青藏高原的生态系统的重要性，故选D。
39．细节理解题。根据“After fixing steel rpes, changing batteries and putting in wind speed and directin sensrs (传感器), they finished imprving the wrld’s highest autmated(自动化的) weather statin, which was setup by Chinese scientists last year.”可知，到目前为止，中国已经建立了世界上最高的自动化气象站。故选C。
五、短文填空
（2023·江苏镇江中考真题）根据短文内容及所给首字母提示写出所缺单词，使短文意思完整，每空一词。
At the dinner table, Westerners use knives and frks, while the Chinese use chpsticks. S 40 at least 3,000 years ag, chpsticks have been the eating tl fr the Chinese peple. Ancient Chinese used pttery pts (陶罐) t ck fd during the Pttery Age. And they used branches r bamb sticks t p 41 up the fd. Later n, they develped the habit f using the chpsticks. In general, the material f chpsticks can be d 42 int five grups: bamb and wd, metal, jade, bne and chemical plastics. In Mdern Chinese family life, peple prefer t use the bamb r wden chpsticks b 43 they are gd fr the envirnment and cst a little.
Using knives and frks r chpsticks brings abut a difference nt 44 in lifestyle. Fr example, the use f knives and frks makes it c 45 fr peple t eat individually (分别地). And the use f chpsticks makes it pssible fr the family members t have meals t 46 . As the Westerners prefer t eat individually, they have the idea and habit f nt d 47 n thers after they grw int adults. The w 48 that Chinese peple use chpsticks and eat with thers arund the table is cnnected with the lifestyle f the Chinese family. Nwadays, an increasing n 49 f freign students are cming t China. They are happy t learn t use chpsticks and enjy the pleasure f eating with friends arund the table.
40．(S)ince 41．(p)ick 42．(d)ivided 43．(b)ecause 44．()nly 45．(c)nvenient
46．(t)gether 47．(d)epending 48．(w)ay 49．(n)umber
【导语】本文主要介绍了中西方使用餐具的文化差异。
40．句意：至少从3000年前开始，筷子就一直是中国人的饮食工具。根据“have been”可知，句子是现在完成时， 结合首字母可知，应填since表示“自从”，故填(S)ince。
41．句意：他们用树枝或竹竿夹起食物。根据“used branches r bamb sticks t the fd.”可知古时候人们用树枝或竹竿夹起食物，此处应用动词短语pick up，动词不定式符号t后，应用动词原形。故填(p)ick。
42．句意：一般来说，筷子的材料可以分为五类：竹木、金属、玉石、骨和化学塑料。be divided int“被分为……”，是固定搭配。故填(d)ivided。
43．句意：在现代中国家庭生活中，人们更喜欢使用竹筷或木筷，因为它们对环境有益，而且价格低廉。根据“peple prefer t use the bamb r wden chpsticks are gd fr the envirnment and cst a little.”可知人们现在喜欢使用竹筷或木筷是因为它们对环境有益，而且便宜。because“因为”符合语境，故填(b)ecause。
44．句意：使用刀叉或筷子带来的不仅仅是生活方式的不同。根据“Using knives and frks r chpsticks brings abut a difference nt lifestyle.”以及下文介绍可知，人们使用刀叉或筷子带来的不仅仅是生活方式的不同。nt nly“不仅仅”，故填()nly。
45．句意：例如，刀叉的使用方便了人们单独吃饭。根据“the use f knives and frks makes it peple t eat individually (分别地).”可知刀叉很方便人们单独吃饭，cnvenient“方便的”，形容词作宾语补足语，故填(c)nvenient。
46．句意：筷子的使用使家庭成员一起吃饭成为可能。根据“the family members t have meals...”结合首字母可知，是指一起吃饭。tgether“一起”符合语境，故填(t)gether。
47．句意：由于西方人喜欢单独吃饭，所以他们长大后有不依赖别人的观念和习惯。depend n“依赖”，是固定搭配，f是介词，后加动名词。故填(d)epending。
48．句意：中国人使用筷子和与他人一起吃饭的方式与中国家庭的生活方式有关。根据“Chinese peple use chpsticks and eat with thers arund the table is cnnected with the lifestyle f the Chinese family”结合首字母可知，中国人使用筷子和与他人一起吃饭的方式与中国家庭的生活方式有关。way“方式”，名词。故填(w)ay。
49．句意：如今，越来越多的外国学生来到中国。an increasing number f表示“越来越多的”。故填(n)umber。
原因状语从句的题目并不难，学生只要能明白句子内在逻辑，看出来句子间的因果关系就可以选出来答案。