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2025年沪教牛津版九年级英语上册精讲精练
Unit 8 Surprise endings
核心语法:连词
一、 什么是连词?
定义: 连词是一种虚词,它不能单独担任句子成分,只起连接词与词、短语与短语以及句与句的作用。
功能: 用来表示并列、转折、选择、因果等逻辑关系。
二、 连词的分类
连词主要分为两大类:并列连词和从属连词。
三、 并列连词
并列连词用来连接平行的词、短语或句子。主要记住 FANBOYS 这个 acronym(首字母缩略词):
For: 因为 (表原因,较正式,不用于句首)
And: 和,并且 (表并列或顺承)
Nor: 也不 (用于否定句后,句子要倒装)
But: 但是 (表转折)
Or: 或者 (表选择);否则 (表否则)
Yet: 然而 (表转折,语气比but强)
So: 所以 (表结果)
用法示例:
表并列/顺承 (and, both...and..., not only...but also..., as well as)
He is tall and handsome.
Both my father and my mother are teachers.
She not only sings well but also dances beautifully.
He plays the piano as well as the guitar.
表选择 (or, either...or..., neither...nor...)
Which do you prefer, tea or coffee
Either you or I am wrong. (就近原则)
Neither he nor I have been to Paris. (就近原则)
表转折 (but, yet, while)
He is young, but he is very experienced.
She worked hard, yet she failed.
I like coffee, while my brother prefers tea.
表因果 (for, so)
He must be ill, for he is absent today. (for是并列连词,不用于句首)
It was raining, so we stayed at home.
四、 从属连词
从属连词用于引导从句(状语从句、名词性从句等)。
1. 引导时间状语从句
when (当...时) / while (在...期间,强调同时) / as (一边...一边...)
before (在...之前) / after (在...之后)
since (自从...以来) / until (直到...)
as soon as (一...就...) / the moment (一...就...)
例句:
When he arrived, I was cooking.
I will call you as soon as I get there.
2. 引导原因状语从句
because (因为,语气最强) / since (既然) / as (由于)
now that (既然)
例句:
I didn't go because I was ill.
Since everyone is here, let's start.
3. 引导条件状语从句
if (如果) / unless (除非,如果不) / as long as (只要)
例句:
You will succeed if you work hard.
You will fail unless you work hard. (= if you don't work hard)
4. 引导目的状语从句
so that (为了,以便) / in order that (为了)
例句:
He got up early so that he could catch the first bus.
5. 引导结果状语从句
so...that... (如此...以至于...) / such...that... (如此...以至于...)
例句:
He is so young that he can't go to school.
It was such a hot day that we all went swimming.
6. 引导让步状语从句
although / though (虽然) / even though (即使)
no matter + 疑问词 (无论...)
例句:
Although it was raining, we went out.
No matter what happens, don't be nervous.
7. 引导比较状语从句
than (比) / as...as... (和...一样) / not as/so...as... (不如...)
例句:
He is taller than I (am).
She is as beautiful as her sister.
五、 易混连词辨析
1、because vs. for vs. so
because 是从属连词,表示直接原因,语气强,可回答why问句。
for 是并列连词,表示附加说明或推断的理由,语气弱,不用于句首。
so 是并列连词,表示结果,不能和 because 在同一句中连用。
错误: Because he was ill, so he was absent.
正确: Because he was ill, he was absent. / He was ill, so he was absent.
2、when vs. while vs. as
when 可指时间点或时间段,从句动词可为延续性或非延续性。
while 仅指时间段,从句动词必须为延续性动词。
as 强调主从句动作同时发生,“一边...一边...”。
3、although/though vs. but
英语中although和but不能同时出现在一个句子里,只能用其中一个。
错误: Although he is old, but he is strong.
正确: Although he is old, he is strong. / He is old, but he is strong.
1.I am looking for my pen everywhere, ____ I can't find it.
A.but B.and C.too D.for
2.He could find the way home ____ he was only three years old.
A.though B.because C.where D.if
3. —Jenny, you can't eat hamburgers ____ice creams. They are bad for your health.
—Thanks, Doctor Green.
A.and B.or C.with D.for
4.Do not let any failures discourage you, for you can never tell close you may be to victory.
A.how B.that C.which D.where
5.________ you have finished your homework, how about going shopping
A.Since B.Before C.When D.Because
6.—Mom,I always make mistakes in my homework,what should I do?
—Well,you know we can make fewer mistakes__we are careful enough.
A.as long as B.even if C.as far as D.so that
7. I don't know ____ she will come tomorrow. ____ she comes, I'll tell you.
A.if; Whether B.whether; That
C.that; If D.whether; If
8. Fast food tastes delicious. ____ eating it too often is bad for your health.
A.Or B.And C.But D.So
9.______ you are leaving tomorrow, we can eat dinner together tonight.
A.For B.Since C.Before
10.Many people do not realize the importance of health ______ they have fallen ill.
A.since B.until C.while D.after
11.Sometimes people won't know the value of friendship _______ they lose it. Therefore, my dear friends,don't try to know your friends' privacy(隐私) _______ say something bad behind their backs.
A.until; while B.when; and C.before; or
12.—How do you like the concert on Saturday
—Exciting, ________ one piece of the music wasn't played quite well.
A.since B.when C.because D.though
13.—Sam doesn't like mutton,beef ________ onions. What does he like
—He thinks apples ________ pears are nice.
A.and; and B.or; or C.or; and D.and; or
14.________ it's a public holiday today, some doctors and nurses in our city are still on duty.
A.If B.When C.Because D.Although
15.— A little monkey might feel sad because of having a new baby sister or brother!
— Yeah. I didn't know that I saw the film Born in China.
A.if B.until C.since D.although
16.She has to stay at home _________ it's raining outside.
A.because of B.because C.so D.and
17.Honesty is very important in many parts of our life, ______________ no matter what you do, you should act with this kind of honesty and be an honest person.
A.so B.but C.however
18.His sister is so fat ______ she eats too much and exercises little.
A.like B.that C.because D.though
19. Let's wait ____the rain stops.
A.so B.while C.since D.until
20.Pandas are cute, ________ they are kind of shy (羞怯的).
A.or B.of C.but D.to
21.This room is small, it's clean and comfortable.
A.unless B.or C.but D.because
22.I would like to be a policeman _____ I want to make our city a safe place.
A.but B.or C.when D.because
23.The meeting didn't begin________Mr. Lee came. He was the host of the meeting.
A.while B.because C.until D.since
24. —You really have a close relationship with Mr. Chen.
—Yes. ____I go to Beijing,I go to visit him.
A.Whatever B.Whenever C.Whoever D.Wherever
25.You don't know whether the shoes fit you ________ you try them on.
A.until B.unless C.when D.as soon as
26.________ English has a history of over 2,500 years, the first English dictionary didn't appear until the 17th century.
A. Because B.Although C.Unless
27.We'll stay at home it rains tomorrow.
A.and B.if C.but D.so
28.They tried their best and finished it on time, ____ the work was hard.
A.when B.though C.because
29.—Would you like to go to the movies with me
—I'd love to, ________ I can't. I'm busy these days.
A.and B.but C.so D.or
30.The young doctor was a bit worried ____it was his first time to operate on a patient.
A.so B.because C.because of D.as
31.My favorite day is Friday _________ I have two PE lessons on that day.
A.but B.so C.because
32.Teresa is ______________ nervous _________________ talk in front of the class.
A.such; that B.too; to C.so; that D.enough; to
33.The winter will be very short___________ it will be warm all year.
A.because B.so C.but D.as
34.I'd like to play tennis with you. ______ I don't have a tennis ball.
A.And B.For C.Or D.But
35.Smile to the world the world will smile back to you.
A.nor B.but C.or D.and
36. John had failed many times before, he didn't lose self-confidence.
A.If B.Since C.Although D.Because
37.The book was so interesting that he had read it for three hours he realized it.
A.before B.after C.until D.since
38.George thought that Tina quite understood him, ________ he wrote to her.
A.so B.or C.but D.for
39.Work harder, you will not keep up with others.
A.and B.or C.so D.but
40.My grandpa is old he thinks he is young.
A.and B.or C.so D.but
41._________________ our class didn't win the final basketball match, we were proud of the players.
A.Though B.Since C.Because D.If
42.Although they feel tired, ______ they still go on working.
A.and B.but C./ D.so
43. Think before you write, ____ you will get good grades in the exam.
A.or B.but C.and D.though
44.Dad sometimes goes to the supermarket with us ________ he hates going shopping.
A.because B.so C.though D.if
45.It was terrible. I couldn't see hear the guide during the trip.
A.and B.or C.but D./
46.Could you help me with housework _____________ you are free today
A.since B.though C.unless D.until
47._____ you_____ your brother can join us. We have had enough people.
A.Both; and B.Either; or C.Neither; nor
48. the Spring Festival, travel is very difficult in winter.
A.Because B.So C.Because of D.Since
49.Have a try, ________ you will never know what you can achieve.
A.or B.while C.till D.and
50.________ the alien was in the museum, I called the TV station.
A.Because B.Then C.As soon as D.While
参考答案及试题解析
1.A
【解析】句意:我正到处找我的钢笔,但是我找不到它。A.but,连词,但是,表示转折;B.and,连词,和,表示并列或承接;C.too,副词,也;D.for,介词,为了;根据 "I am looking for my pen everywhere, "与" I can't find it."之间是转折关系,因此用表示转折的连词but连接,故选A。
【点评】考查连词辨析。识记but和and的用法。
2.A
【解析】句意:虽然他只有三岁,但他能找到回家的路。A 虽然;B 因为;C 在哪里;D 如果。分析语句He could find the way home 与he was only three years old.的含义可知,后者是前者的条件,要用though来连接,故选A。
【点评】考查连词的辨析。熟知每个选项的含义,根据语境或句意来确定最佳选项。
3.B
【解析】句意:——Jenny,你不能吃汉堡或冰淇淋。它们对你的健康有害。——谢谢,格林医生。and和,表示并列关系,常用于肯定句;or或者,表示选择关系,常用于疑问句或否定句;with和;for为了。对话中"Jenny, you can't eat hamburgers ____ ice creams."为否定句,表示"Jenny,你不能吃汉堡或冰淇淋"。故选B。
【点评】考查连词辨析。注意重点识记and和or的词义及用法。
4.A
【解析】句意为:不要让失败阻挠你,因为你不能辨别你离成功有多近。这是一个含有宾语从句的主从复合句。how多么,如何;that没有词意;which哪个;where哪里,表示地点,close近的,形容词,how副词,表示程度,可修饰形容词或副词,how close表示多近,故选A。
【点评】此题考查连词辨析。根据上下文的联系确定所使用的连词。
5.A
【解析】句意:既然你已经完成作业了,去购物怎么样?A.Since,既然,由于;B.Before,在之前;C.When,当……时候;D.Because,因为;根据句意,用since连接符合题意,故选A。
【点评】考查连词辨析。识记since的用法。
6.A
【解析】句意:——妈妈,我的作业总是出错,我该怎么办?——嗯,你知道只要我们足够小心,我们就可以少犯错误。A:as long as只要;B:even if即使;C:as far as就.......而言;D:so that目的是。根据空格前you know we can make fewer mistakes. 你知道我们可以少犯错误。可知此处是指只要我们少犯错误,就可以少犯错误,表示条件,应用as long as引导条件状语从句,故选A。
【点评】考查连词辨析,注意识记连词as long as的用法,选出正确答案。
7.D
【解析】句意:我不知道她明天是否会来。如果她来了,我会告诉你的。if,是否,引导宾语从句;如果,引导条件状语从句;whether,是否,引导宾语从句;that,无意义,引导宾语从句。根据句子结构可知第一个空为宾语从句的引导词,意为"是否";排除C选项。第二个空为"如果",引导条件状语从句,用if,故答案为D。
【点评】考查连词辨析。理解句意并识记宾语从句和状语从句的用法。
8.C
【解析】句意:快餐尝起来很美味。但是吃得太多对你的健康有害。Or或者,不然;And和,并且;But但是;So因此,所以;根据 Fast food tastes delicious. (快餐唱起来很美味) 和eating it too often is bad for your health.(吃得太多对你的健康有害。)可知两个句子之间是转折关系,用but连接,故答案为C。
【点评】考查表示转折关系的连接。理解句意并掌握but表示转折意义的用法。
9.B
【解析】句意:既然你明天就要走了,我们今晚可以一起吃晚饭。for因为,从句放在主句后面说明理由,语气较弱,不用于句首;since既然,说明为人所知的原因。语气比because稍弱。before在……之前,引导时间状语从句;根据句意可知这里是表示原因,又在句首主句前,故答案为B。
【点评】考查连词辨析。理解句意并识记since和for的用法区别。
10.B
【解析】句意:许多人直到生病了才意识到健康的重要性。直到……才……:not…until…。故选B。
【点评】考查引导状语从句的连词辨析。
11.C
【解析】句意:在友谊失去之前,有时人们不会知道友情的价值,因此亲爱的朋友,不要设法知道你朋友的隐私,或者在背后说一些坏话。第一个空表示失去了才知道友谊的珍贵,until 直到......才;while当.....时候;while当......时候;before在......之前;and和、又;or或者;故排除when;第二个空前后都是不要去做的事情,在否定句中用or代替and。结合语境,故选C。
【点评】本题考查连词的词义辨析。以及until; while;when; and;before; or几个次的词义和用法。
12.D
【解析】句意:——你觉得星期六的音乐会怎么样 ——令人兴奋,尽管有一段音乐演奏得不是很好。since自从;when何时;because因为;though虽然、尽管。根据“Exciting”,以及“one piece of the music wasn't played quite well.”可知在这两个句子之间存在一个相反的让步关系,因此用though引导让步状语从句,故选D。
【点评】考查连词辨析,首先识记连词词义,然后根据前后句句意确定。
13.C
【解析】句意:——山姆不喜欢羊肉、牛肉和洋葱。他喜欢什么?——他认为苹果和梨很好吃。连词and,和,又,用在肯定句中连接并列部分;or还是,用在否定句中连接并列部分。前句是否定句,要用or;后句是肯定句,要用and。故填C。
【点评】考查连词and和or的用法。注意根据句子种类,做出正确选择。
14.D
【解析】句意:虽然今天是公共假日,但我们市的一些医生和护士仍在值班。A.if如果;B.when什么时候;C.because因为;D.although虽然。根据句子"it's a public holiday today"与"some doctors and nurses in our city are still on duty"可此处是转折关系,虽然是节假日,但还是有人值日,故选D。
【点评】考查连词辨析。注意根据句子之间的逻辑关系来选择连词。
15.B
【解析】句意:——一只小猴子可能因为有了新的小妹妹或小弟弟感到伤心!——是的。我直到看了电影《生在中国》才知道。if如果;until直到.……;since由于;although尽管。根据题干前半句I didn't know that…我并不知道……,下半句I saw the film Born in China.我看了电影《生在中国》。可知,此处应填连词until,构成not...until...句型,意思是:直到.……才……,意为:直到我看了电影《生在中国》我才知道。故选B。
【点评】考查连词辨析。理解各个选项的含义,掌握not...until...的用法。
16.B
【解析】句意:因为外面在下大雨,所以她必须待在家。A .because of因为,后跟名词短语;B .because因为,后跟原因状语从句;C . so因此,表示结果;D .and并且,表示并列。It's raining outside是她待在家的原因,原因状语从句,用because引出。故选B。
【点评】考查引导状语从句的连词辨析。
17.A
【解析】句意:诚实在我们生活的很多方面都很重要,所以无论你做什么,你都应该以这种诚实的态度行事,成为一个诚实的人。so因此,所以;but但是;however然而;根据Honesty is very important in many parts of our life和no matter what you do, you should act with this kind of honesty and be an honest person. 可知诚实在我们生活中很重要是下文的原因,后面是前面的结果,so因此,连接结果状语从句,符合题意,故答案为A。
【点评】考查连词辨析。注意识记so的意义和用法。
18.C
【解析】句意:他的姐姐是如此胖,因为她吃太多,锻炼的少。A.像;B.那个;C.因为;D.尽管。因为吃太多,锻炼少,所以胖,后句表示原因,所以用because,故选C。
【点评】考查连词辨析,首先识记选项意思,然后根据句意确定。
19.D
【解析】句意:我们等雨停了再说。A所以,引导结果状语从句,B而,表示对比,C自从,是现在完成时标志,D直到,引导时间状语从句,搭配持续性动词,根据wait和rain stops,可知是同时存在的动作,故是时间状语从句,可知持续动词搭配until,表示动作一直持续到雨停,故选D。
【点评】考查连词辨析,注意识记until的用法。
20.C
【解析】考查连词辨析。A. or 或者 选择关系的连词 B. of …的 介词C. but 但是 转折关系的连词 D. to 到;介词 。句意:熊猫很可爱,但是他们有点害羞。前句与后句是转折关系,根据句意答案为C。
21.C
【解析】句意:这个房间很小,但是他很干净舒服。根据
This room is small和
it's clean and comfortable.可知这两句之间是转折关系,unless除非;or或者,but但是,because因为,故选C。
【点评】此题考查连词辨析。弄清每个连词的使用规则,然后根据上下文的联系确定所需的连词.
22.D
【解析】句意:我想当一名警察,因为我想让我们的城市成为一个安全的地方。but但是,表示转折关系,or或者,表示选择关系,when当……时候,引导时间状语从句,because因为,引导原因状语从句,后面 I want to make our city a safe place.我想让我们的城市成为一个安全的地方,是前面 I would like to be a policeman我想成为一名警察的原因,要用because,故选:D。
【点评】考查连词辨析。注意识记but,or,when,because四个连词的词义及用法,结合语境选择合适的答案。
23.C
【解析】句意:直到李先生来了,会议才开始。他是会议的主持人。while当……时候;because因为;until直到;since自从……时候;not…until…直到……才;固定搭配,根据He was the host of the meeting.可知Mr Lee是主持人,他不来会议开不了。故答案为C。
【点评】考查连词辨析。注意识记连词until的用法和not…until 固定搭配的用法。
24.B
【解析】句意:——你真的和陈先生关系很亲密。——是的。无论何时我去北京,我都会去拜访他。Whatever无论什么; Whenever无论何时; Whoever无论谁; Wherever无论哪里。根据语句…I go to Beijing,I go to visit him. 可知,此处表达的是"无论何时",whenever符合题意,故答案为B。
【点评】考查连词辨析。辨析每个选项的含义,结合句意,选择正确答案。
25.A
【解析】句意:你试穿鞋子才会知道是否适合你。until直到;unless除非;when当……的时候; as soon as一……就。not…until直到……才,是一个固定句型,所以选A。故选A。
【点评】考查连词辨析,首先识记连词区别,然后识记固定搭配not...until...。
26.B
【解析】句意:虽然英语有2500多年的历史,第一部英语词典直到17世纪才出现。A: Because因为;B: Although虽然;C: Unless除非;根据上下文句的意思,可知是转折关系,用although,故选B。
【点评】考查连词辨析,注意识记although的用法。
27.B
【解析】句意:如果明天下雨,我们将呆在家里。nd和;if如果;but但是;so所以.根据题干可知主句是一般将来时,if引导的条件状语从句中是一般现在时,遵循主将从现的原则,故选B.
【点评】考查连词辨析。
28.B
【解析】句意:尽管工作很辛苦,他们还是尽力按时完成了。A:when当......时候;B:though虽然;C:because因为。根据句子They tried their best and finished it on time. 他们还是尽力按时完成了。可知此处是指尽管工作很辛苦,应用though,故选B。
【点评】考查连词辨析,注意识记连词though的用法。
29.B
【解析】句意:——你想和我一起看电影吗?——我想去,但是我不能。这几天我很忙。A: and表顺承,和,又;B: but表转折,但是;C: so表因果,所以;D: or否则。根据题意,两个句子之间是转折关系,故选B。
【点评】考查连词,注意识记连词的意思和用法。
30.B
【解析】句意:这位年轻的医生有点担心,因为这是他第一次给病人做手术。A.所以,表示结果;B.因为,表示原因,连词;C.因为,表示原因,介词短语;D.当......时候。The young doctor was a bit worried这位年轻的医生有点担心,it was his first time to operate on a patient这是他第一次给病人做手术,可知前后句表示因果关系,后句表示原因,it was his first time to operate on a patient是句子,所以用because,故选B。
【点评】考查连词辨析,首先识记连词词义,然后根据前后句句意确定连词,理解because和because of的区别。
31.C
【解析】句意:我最喜欢的一天是星期五,因为那天我有两节体育课。A.但是,表示转折;B.所以,表示结果;C.因为,表示原因。My favorite day is Friday我最喜欢的一天是星期五,I have two PE lessons on that day.那天我有两节体育课,可知前后句表示因果关系,后句表示原因,所以用because,故选C。
【点评】考查连词辨析,首先理解连词词义,然后根据前后句句意确定连词。
32.B
【解析】句意: 特蕾莎很紧张,以至于在全班面前不能讲话。A如此......以至于,引导状语从句,修饰名词,B太......而不能,其后是动词原形,C如此......以至于,引导状语从句,修饰形容词或副词,D足够做某事,talk是动词原形,故排除A和C选项,紧张导致在全班面前不能讲话,故是too...to的用法,故选B。
【点评】考查连词辨析,注意识记too...to的用法。
33.A
【解析】句意:冬天会很短,因为全年都很暖和。because因为;so因此,所以;but但是;as作为;当……时候;根据The winter will be very short和it will be warm all year.可知冬天短的原因是因为全年都暖和,故答案为A。
【点评】考查连词辨析。注意识记连词because的用法。
34.D
【解析】句意:我想和你打网球,但是我没有网球。根据“I‘d like to play ”和下文的I don't have 可知这里意思为转折, but(但是)表转折,结合所给选项,故答案为D。
【点评】考查连词辨析。理解句意并掌握连词的意义和用法。
35.D
【解析】句意:对世界微笑,世界也会对你微笑。A 也不;B 但是;C 或者,否则;D 然后;结合语境故选D。
【点评】考查连词的用法。
36.C
【解析】句意:尽管约翰失败了很多次,但是他没有失去自信。A.如果;B.自从,因为;C.尽管;D.因为。根据前后句句意可知,前句表示让步关系,用although引导让步状语从句,故选C。
【点评】考查连词辨析。注意理解单词词义,理解句意,注意although引导让步状语从句。
37.A
【解析】句意:这本书是如此的有趣以至于他不知不觉已读了三个小时。由The book was so interesting that he had read it for three hours可知在他意识之前,就已经读了三个小时。before 在……之前。故选A。
【点评】考查连词辨析。注意识记before的用法。
38.A
【解析】句意:乔治认为蒂娜完全理解他,所以他给她写信。so所以,表因果;or或者,表选择;but但是,表转折;for因为,表原因。根据填空处句子的意思可知,此处表因果,用连词so。故选A。
【点评】考查连词辨析,注意连词so的用法。
39.B
【解析】句意:努力学习,否则你将赶不上其他人。A、和;B、或者,否则;C、因此;D、但是。由句意可知这里说的是“努力学习,要不然你就赶不上别人”,要不然,否则,or,故选B。
【点评】考查连词辨析,注意理解选项词义,理解句意。
40.D
【解析】句意:我的爷爷年龄大了但他认为很年轻。and和,表示递进和顺承;or:或者,表示选择;so:因此,表示因果关系;but:但是,表示转折关系。根据句意可知前后句表示转折,可知填but,故选D。
【点评】考查连词辨析,首先识记其区别,然后根据前后句句意确定。
41.A
【解析】句意:虽然我们班没有赢得最后一场篮球赛,但我们为队员们感到骄傲。though虽然,引导让步状语从句,since既然,引导原因状语从句,because因为,引导原因状语从句,if如果,引导条件状语从句,联系前后句,表示转折关系,”虽然“要用Though/Although。故选A。
【点评】考查连词辨析。注意识记though,since,because和if词义及用法,掌握though引导让步状语从句。
42.C
【解析】句意:尽管他们感到很劳累,但是他们仍旧坚持工作。结合语法知识,although表示"虽然,尽管",不能和"but,但是",出现在同一个句子内。故答案为:C。
【点评】考查although与but不同在一个句中的用法。
43.C
【解析】句意:写之前要三思,这样你在考试中会得到好分数。or或者,否则;but但是;and和,并且; though 虽然。根据语境可知,前后文是顺承关系,因此用and连接。故选:C。
【点评】掌握"祈使句+and/or+陈述句"结构,结合语境,给出答案。
44.C
【解析】句意:爸爸有时和我们一起去超市,尽管他讨厌购物。A.因为,表示原因;B.所以,表示结果;C.尽管,表示让步;D.如果,表示条件。Dad sometimes goes to the supermarket with us爸爸有时和我们一起去超市,he hates going shopping他讨厌购物,结合选项可知尽管爸爸不喜欢去购物,但是他有时和我们去购物,故选C。
【点评】考查连词辨析,首先识记连词词义,然后根据前后句句意确定。
45.B
【解析】句意:太糟糕了。在旅途中我看不见也听不见导游。A、和,用于肯定句中,表并列关系;B、和,用于否定句中表示并列关系,或者,用于选择疑问句中表示选择;C、但是;D、不填。这是一个否定句,句中see和hear表示并列关系,意为“看不见也听不见”,故选B。
【点评】考查连词辨析,注意and,or,but的词义和不同用法。
46.A
【解析】句意:既然你今天有空,你能帮我做家务吗?since ,既然,由于,表示显而易见的原因。though, 虽然,引导让步状语的从属连词;unless, 除非,引导条件状语从句的连词;until, 直到……引导时间状语从句的连词。根据句意, 故选A。
【点评】本题考查连词的用法。
47.C
【解析】both…and表示两者都,谓语动词用复数的形式,Neither… nor表示两者都不,谓语动词就近原则,Either..or...表示或者……或者…… ,谓语动词就近原则,句意:你和你的弟弟两个都不能加入我们,我们有足够的人。故选C。
48.C
【解析】句意: 因为春节,冬天旅行很困难。A因为,引导原因状语从句,B所以,引导结果状语从句,C因为,其后是单词或短语做宾语,D既然,引导原因状语从句,根据the Spring Festival是名词,可知用because of,故选C。
【点评】考查连词辨析,注意because of的用法。
49.A
【解析】句意:试一试,否则你永远不知道你能取得什么成就。or否则;while当......时;till直到;and和。此句是祈使句+or/and+简单句的结构,Have a try尝试一下,you will never know what you can achieve不知道能得到什么,结合选项可知讲的是否则不知道取得什么成就,故选A。
【点评】考查连词辨析,首先理解连词词义,然后根据前后句句意确定答案。
50.D
【解析】句意:当外星人在博物馆时,我给电视台打了电话。A.因为;B.然后;C.一……就;D.当……的时候。根据 I called the TV station. 我给电视台打了电话,可知是“当外星人在博物馆时”,应用连词while“当”。故选D。
【点评】考查连词辨析。注意掌握连词while“当……的时候”的用法。
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