【弯道超车】专题43 连词辨析-2025年九年级年级英语暑假自学习精讲精练(通用版)(含答案解析)

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【弯道超车】专题43 连词辨析-2025年九年级年级英语暑假自学习精讲精练(通用版)(含答案解析)

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【弯道超车】2025年九年级年级英语暑假自学习精讲精练
(通用版)专题43 连词辨析
一、并列连词 vs 从属连词
类型 功能 示例 标点使用
并列连词 连接同等成分 and, but, or 连接句子时加逗号
从属连词 引导从句 because, when, if 从句在前时加逗号
记忆要点:
并列连词连接"平等"的成分
从属连词制造"主从"关系
二、常见易混连词辨析
1. because/since/as/for (表原因)
连词 用法特点 例句
because 直接原因,语气最强 I stayed home because I was ill.
since 已知原因,语气次之 Since you're busy, I'll go alone.
as 附带原因,语气最弱 As it's raining, take an umbrella.
for 补充说明,不用于句首 It must be morning, for birds are singing.
易错警示:
because不能与so连用
for是并列连词,其他是从属连词
2. when/while/as (表时间)
连词 用法特点 例句
when 时间点或时间段 When I arrived, he was reading.
while 强调同时进行的动作 While I was cooking, she was setting the table.
as 伴随变化或同时动作 As I grew older, I became wiser.
特殊用法:
when可表示"就在这时"(突然发生某事)
I was about to leave when the phone rang.
3. if/unless (表条件)
连词 用法特点 例句
if 正面条件 If you study hard, you'll pass.
unless 反面条件(if not) You'll fail unless you study hard.
转换关系:
Unless = If...not
Unless it rains = If it doesn't rain
4. although/though/even though (表让步)
连词 用法特点 例句
although 正式用语,不用于句末 Although it was late, we continued.
though 口语化,可用于句末 It was expensive, I bought it though.
even though 语气最强 Even though I was tired, I kept working.
易错警示:
不与but连用
though可作副词放句末,although不行
三、并列连词内部辨析
1. and/but/or
连词 逻辑关系 例句
and 并列 I like apples and bananas.
but 转折 She's young but very mature.
or 选择 Would you like tea or coffee
特殊用法:
or可表示"否则"
Hurry up, or you'll be late.
2. so/for
连词 逻辑关系 例句
so 表结果 It was late, so I went home.
for 表原因 I stayed in, for it was raining.
区别要点:
so前因后果,for前果后因
for更正式,多用于书面语
四、从属连词特殊用法
1. 时间状语从句中的时态
主将从现:If it rains, we will stay home.
主过从过:When I was young, I liked dancing.
2. 比较状语从句的省略
She is taller than I (am).
This book is as interesting as that one (is).
3. 方式状语从句的虚拟
He talks as if he knew everything.(虚拟语气)
五、连词使用常见错误
1、连词重复:
错误:Because he was ill, so he stayed home.
正确:Because he was ill, he stayed home. 或 He was ill, so he stayed home.
2、语序错误:
错误:I wonder where is he.
正确:I wonder where he is.
3、时态错误:
错误:If it will rain, we won't go.
正确:If it rains, we won't go.
4、逻辑混乱:
错误:He is tall and he is short.
正确:He is tall but his brother is short.
1.My name is Sara ___________________ I'm from America.
A.and B.so C.but D.with
2.Mrs. Chen always allows the children to express their opinions, _____sometimes their opinions are not important.
A.even though B.ever since C.so that
3.The nurse won't leave her patients ________ she's sure they are all taken good care of.
A.if B.since C.until D.because
4.一 These glasses are very expensive, so please be careful with them.
一 OK. I'll be careful.
A.therefore B.but C.because
5._______they are brothers, they don't look like each other at all.
A.Because B.When C.Though D.As
6.—Daddy, can I go out to play soccer with my friends now
—Well, you can't go ______you finish your homework first.
A.if B.since C.unless
7. I____science today. It's difficult ____ interesting.
A.have;so B.has;but C.have;but
8.He realized his mistakes and took action to reduce the loss _______ it was too late.
A.until B.when C.before D.as
9.—Time is up. I have to go now.
—Oh, it's raining heavily outside. You'd better wait here ______ it stops.
A.until B.while C.since
10.He didn't go to the cinema not _______ the weather, but_______ he didn't want to see the film.
A.because of; because B.because; because of
C.because; because D.because of; because of
11.Everyone will get uncomfortable ____ he stops smoking here.
A.when B.unless C.except D.if
12. I was full, ____ the ice cream looked so good that I couldn't help trying it.
A.and B.but C.so D.or
13._______ it was really rainy, it _______ me a long time to get there.
A.Because; took B.For; takes C.For; spent D.Because; cost
14.— What is our head teacher like, do you know
— Oh, he is very kind ________ he looks very serious.
A.because B.though C.if D.when
15.___________ you drive, you mustn't drink wine at all.
A.If B.Unless C.Though D.Until
16.______________ she couldn't see his face, she could tell by his voice that he was young.
A.Unless B.If C.Because D.Though
17.—Oh, my god. I've already worked for several hours without a rest.
—I think you must stop working you might turn into a machine.
A.so B.and C.or D.but
18.—I think I am the shyest in my class. What should I do
—Be more active in class ____you can improve your ability to express yourself.
A.or B.so that C.unless D.although
19.I don't eat junk food, I like junk food a lot.
A.although B.since C.as D.because
20.Tony was drawing a picture_______ I was doing my homework.
A.if B.because C.while D.until
21._________you keep working hard, you will succeed some day
A.If B.Though C.Until D.Unless
22.The flight was late because of the storm, we had to wait at the airport.
A.but B.or C.as D.so
23.In America, a friend inviting you to a restaurant doesn't mean that he or she will pay for the meal ______ you are told ahead.
A.until B.unless C.although D.if
24.A recent survey shows that 44 percent of Americans want to use self-driving cars. ________________ 34 percent believe that they will make the roads more dangerous.
A.Although B.Because C.If D.So
25.—I like math very much. Do you like math
—Yes, I do. I think it is difficult interesting.
A.and B.but C.so
26.He is tall, _______ his son is short.
A.when B.or C.while
27._________________ I don't like vegetables, I always eat some to keep me healthy.
A.Because B.Since C.Though D.When
28.More and more children are interested in blind boxes ________ they wonder what is inside.
A.because B.even though C.so
29.I'm a teacher ________ I'm American.
A.but B.and C.or D.so
30.Each player of the team practices hard ______ they can win the next game in the future.
A.so that B.such that C.that D.because
31.I can't understand this passage _____ there are no new words in it.
A.if B.because C.though D.and
32.I'd like to go with you, ________________ I must finish my homework first.
A.and B.but C.so D.or
33.—Do you often do exercise, Bill
—No. Actually, I haven't done much exercise________ I got a new computer.
A.for B.since C.unless D.although
34. It is necessary to ask your parents or teachers for some advice ____ you make the final decision.
A.because B.unless C.before D.after
35.—Jack, have you done the survey
—Not yet. I am in New York now. I'll finish it ___________ I come back.
A.whenever B.as soon as C.before D.after
36.My parents ________ I like chicken, ________ we always eat it for dinner.
A.and; but B.so; but C.but; so D.and; so
37.—When did you know there would be an important meeting
—_______ Sandy called me this morning.
A.Since B.Till C.Not until D.While
38.The old man asked the girl to take another seat he wanted to sit next to his wife.
A.because B.because of C.so D.so that
39.—Which do you prefer, tea _____ coffe
—Tea, please.
A.but B.so C.or D.and
40.They spoke quietly I could hardly hear them.
A.such; that B.so; that C.neither; nor
41.It won't be long ________ we leave our junior middle school.
A.because B.until C.before D.though
42.Mary has learned a lot about the history of Sichuan ______ she can be a tour guide.
A.even if B.as soon as C.so that
43.— How do you like the concert
— Great, ________ one piece of the music wasn't played quite well.
A.though B.because C.so D.and
44.-- Would you like to go to the concert with me
-- I'd love to. I'm afraid I have no time.
A.so B.or C.and D.but
45.He has a baseball, _______ he doesn't have a baseball bat.
A.but B.and C.so D.because
46.Everyone can make great progress _______ he works hard.
A.if B.unless C.when D.that
47.—Tony, what are you going to do this afternoon
—I'm going to stay at home __________ it's raining outside.
A.and B.so C.but D.because
48.Some children prefer to eat junk food it's not good for their health.
A.although B.if C.as
49.My father was drinking tea in the living room ______________ my mother was doing the dishes in the kitchen.
A.if B.while C.until D.unless
50.一 I hear Susan will go to Beijing by herself.
一 That's true. her father her mother will go with her.
A.Both; and B.Either; or C.Neither; nor
参考答案及试题解析
1.A
【解析】句意:我的名字是Sara,并且我来自美国。A.和、并且,表示并列,连词;B.所以,表示结果,连词;C.但是,表示转折,连词;D.和,介词。前后句都是句子,所以用连词连接,排除D。两句表示并列,所以用and,故选A。
【点评】考查连词辨析,首先识记连词词义,然后根据句意确定。
2.A
【解析】句意:Mrs. Chen总是允许孩子们表达他们的观点,即使有时候他们的观点并不重要。A.even though,即使、尽管,表示让步关系;B.ever since,从那以后,表时间;C.so that,以便、为了,表目的;“Mrs. Chen always allows the children to express their opinions”与“sometimes their opinions are not important.”之间是让步关系,因此此处用到表示让步关系的连词,故选A。
【点评】考查连词辨析。识记even though、ever since、so that的用法。
3.C
【解析】句意:护士在确定病人都得到很好的照顾之前是不会离开的。if,如果;since,自从;until,直到……;because,因为;根据“won't leave her patients...she's sure they are all taken good care of.”可知,此处指的是“不会离开直到……”,构成“not...until”的结构,所以此处用until引导时间状语从句,故选C。
【点评】考查连词辨析。识记until的用法。
4.A
【解析】therefore 因此,所以,but 但是,because 因为,根据句意“这些玻璃杯很昂贵,所以要当心”可知选A。
【点评】本题考查连词辨析,考的是学生的基础词汇知识,首先要求学生有一定的词汇量,句意理解后便可作答,所以平时的基础知识记忆,词汇积累是解答好这种题的关键。
5.C
【解析】句意: 尽管他们是兄弟,可是他们一点也不像对方。A因为,B当......时候,C尽管,D作为,根据, they are brothers, they don't look like each other,可知是兄弟又彼此不像,故此处是让步关系,故用尽管,故选C。
【点评】考查连词,注意though的用法。
6.C
【解析】句意:——爸爸,我现在可以和朋友们出去踢足球吗?——嗯,你不能去,除非你先完成作业。if如果;since自从;unless除非。you can't go你不能去,you finish your homework first.你先完成作业,结合选项可知讲的是除非先完成作业,否则不能去,用unless引导条件状语从句,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连词。
7.C
【解析】句意:我今天有自然科学。它复杂但是有趣。have,动词,有,单三是has;so,连词,所以;but,连词,但是;I作主语,谓语用have;difficult与interesting之间是转折关系,因此用but连接,故选C。
【点评】考查一般现在时、连词辨析。识记I作主语的一般现在时态的句子谓语动词用原形。
8.C
【解析】A. until直到 B. when 当…时候C. before在…之前 D. as当…时候,作为;句意:他意识到他的错误并且及时的采取措施减少了损失,before it was too late在太晚之前,及时,故选C
【点评】连词在中考中涉及到的很多,尤其在宾语从句、状语从句、定语从句中连词是必考点。平时学习过程中,掌握连词的意思,及所表示的关系是至关重要的,这种关系的判断可以通过句子意思的理解来选择恰到的连词。
9.A
【解析】句意:-时间到了,我现在必须走了。-哦,外面在下大雨。你最好在这儿等到雨停。A. until直到;B. while当……时;C. since自从。句子表达的是“在这儿等到雨停”,直到,until。故选A。
【点评】本题考查连词词义辨析。以及 until; while;since三个词的词义和用法。
10.A
【解析】句意:他没有去看电影不是因为天气,而是因为他不想去看电影。because of+名词或代词;第一空不是句子,所以用because of;because+句子。第二空后是句子,所以应该用because,故选A。
11.B
【解析】句意:除非她在这里戒烟,否则每个人都会感到不舒服。A当......的时候,B除非,C除了,D如果,根据Everyone will get uncomfortable,前提是he stops smoking here,故是条件状语从句引导词,是否定含义,如果她在这里不戒烟,否则每个人都会感到不舒服,故用unless,故选B。
【点评】考查连词辨析,注意识记unless的用法。
12.B
【解析】句意:我吃饱了,但冰淇淋看起来太美味了,我忍不住试了一下。A并且;B但是;C所以;D或者。根据I was full 我吃饱了,可知本来不再吃了,"忍不住试了"为转折,应用转折连词but。故选B。
【点评】考查连词辨析。注意熟记动词help"帮助":第三人称单数: helps;现在分词: helping;过去式: helped;过去分词: helped。
13.A
【解析】句意:因为天下雨了,到那里花了我很长时间。根据was,可知是过去时态,所以排除B;因为spend主语是人,题干主语是it,所以排除C;因为cost是花钱,所以排除D;故选A。
【点评】考查连词和动词辨析,注意识记because和take的用法。
14.B
【解析】句意:你知道我们的校长是什么样的人吗?尽管他看起来很严肃,但他很善良。A.因为;B.尽管,虽然;C.如果;D.当……时候。故选B。
【点评】考查连词的用法
15.A
【解析】句意:如果你开车,你就不能喝酒。if如果,引导条件状语从句,unless如果不,除非,though虽然,引导让步状语从句,until直到,引导时间状语从句,根据句意,”如果你开车,你就不能喝酒。“故选A。
【点评】考查连词辨析,注意识记if,unless,though和until的词义和用法。
16.D
【解析】句意: 虽然她看不见他的脸,但从他的声音可以看出他很年轻。unless除非,引导条件状语从句,if 如果,引导条件状语从句,because因为,引导原因状语从句,though虽然,引导让步状语从句,第一句”我看不见他的脸“,第二句”从他的声音可以看出他很年轻。“,联系前后句,这里表示转折关系,故选D。
【点评】考查连词辨析。注意识记unless,if,because和though的词义及用法。
17.C
【解析】句意:——噢,我的天。我已经工作了几个小时没有休息了。——我认为你必须停止工作,否则你可能会变成一台机器。A. 因此;B. 和;C否则,或;D. 但是。根据空前you must stop working与空后you might turn into a machine. 是一种警告或忠告,否则,不然的意思,故选C。
【点评】此题考查连词辨析。弄清每个连词的意思,并且根据两句之间的关系,选择合适的连词。
18.B
【解析】句意:——我想我是班上最害羞的。我该怎么办?——在课堂上更加活跃,这样你就可以提高自己的表达能力。A.or或者;B.so that以便;C.unless除非;D.although尽管。根据 you can improve your ability to express yourself.可知,提高自己表达能力是上课积极活跃的目的,需用so that引导目的状语从句,故选B。
【点评】考查连词辨析。注意识记or,so that,unless,although的词义,另外注意区分so that和so...that...的区别,so that表示以便,引导目的状语从句,so...that...表示如此……以至于……,引导结果状语从句。
19.A
【解析】句意:我不吃垃圾食品,尽管我很喜欢垃圾食品。although尽管,引导让步状语从句;since自从,引导时间状语从句;as正如,引导方式状语从句;because因为,引导原因状语从句;根据句意这是一个让步状语从句,故选A。
【点评】考查连词辨析,根据从句中句中充当的成分从而选出合适的连词。
20.C
【解析】句意:Tony 正在画画,而我在做作业。由前后两句话的 was doing 能发现是两个过去进行时的动作,因此可以选用 while 链接,属于时间状语从句。与 A. if 引导的条件状语从句和 B. because 引导的原因状语从句无关。而 D. until 表示直到,与原句逻辑关系不符。故选C。
【点评】本题考查连词辨析。根据语境选出合适的连词,确保句子通顺。
21.A
【解析】句意:如果你一直努力工作,你某一天终会成功。A如果,B虽然,C直到,D除非,会成功的前提条件是一直努力工作,应用if连接,引导条件状语从句,故选A。
【点评】考查从属连词辨析。理解不同连接词的用法,根据语境确定合适的词汇。
22.D
【解析】句意:因为暴风雨,航班迟到了,所以我们不得不在飞机场等。but,但是,连接的成分是转折关系;or或者,连接的成分之间是选择关系;as当……时候,引导时间状语从句;so,所以,连接的成分之间是因果关系。前半句表示航班晚点,后半句我们必须在机场等,前后是因果关系,故用连词so,故选D。
【点评】此题考查连词辨析。
23.B
【解析】句意:在美国,如果你没有被提前告知的话,一个朋友邀请你去餐馆意思并不是她(他)要买单。A. until 直到;B. unless如果不;C. although虽然;D. if如果。根据句意,故选B。
【点评】考查连词的用法。
24.A
【解析】句意:最近的一项调查显示,44% 的美国人希望使用自动驾驶汽车。尽管34% 的人认为它们会使道路变得更加危险。A Although“尽管”,引导让步状语从句;B Because“因为”,引导原因状语从句;C if“如果”,引导条件状语从句;D so“因此”,引导结果状语从句。分析句子结构可知前后是让步关系,因此用although。故选A。
【点评】考查连词辨析。注意熟记although的含义。
25.B
【解析】句意:——我非常喜欢数学。你喜欢数学吗?——是的,我喜欢。我认为这很难但是很有趣。考查连词辨析。and和,表并列;but但是,表转折;so所以,表结果。分析句子可知,difficult和interesting之间构成转折关系,表示很难但是很有趣。故选B。
【点评】考查连词辨析。注意不同连词用法的区别。
26.C
【解析】句意:他很高,而他的儿子很矮。A当......的时候,B或者,C而,表示转折,根据他很高,他的儿子很矮,可知表示转折关系,故用while,故选C。
【点评】考查连词辨析,注意识记while的用法。
27.C
【解析】句意:虽然我不喜欢蔬菜,我总是吃一些来保持健康。because因为,since自从,though虽然,when当……时候,根据逻辑关系,可知是虽然不喜欢蔬菜,但是总是吃,故选C。
【点评】考查连词辨析,注意识记though的用法。
28.A
【解析】句意:越来越多的孩子对盲盒感兴趣,因为他们想知道里面是什么。A 因为,表示原因;B 尽管,表示条件;C 因此,表示结果。根据语句More and more children are interested in blind boxes与they wonder what is inside.的含义可知,后者是前者的原因,故答案为A。
【点评】考查连词辨析。注意连词because的含义及用法。
29.B
【解析】句意:我是名老师,我是美国人。A但是,B并且,C或者,D所以,根据我是名老师,我是美国人,可知此处是并列关系,都是介绍自己就情况,故用连词and,故选B。
【点评】考查连词辨析,注意and表示并列的用法。
30.A
【解析】句意: 每个队员都努力练习,以便他们可以在未来赢得下一场比赛。 A.以便,引导目的状语从句;B.无此搭配;C.那个;D.因为。根据空格前后内容可知,后句是前句的目的,所以此处用so that引导目的状语从句,故选A。
【点评】考查短语辨析和连词辨析。注意理解选项意思,理解句意,注意so that引导的目的状语从句。
31.C
【解析】句意:这篇文章虽然没有新单词,但我看不懂。if如果;because因为;though尽管,虽然;and和;根据句意可知是虽然没有生词,但我不懂,though,符合题意,故答案为C。
【点评】考查连词辨析。识记though的意义和用法。
32.B
【解析】句意:我想和你去,但是我必须先做完作业。and并且,but但是,so所以,or否则,根据I must finish my homework first,可知与上文是转折关系,but表转折,故选B。
【点评】考查连词辨析,注意识记but的用法。
33.B
【解析】句意:——Bill,你经常运动吗?——不,事实上,我自从有了新电脑我就不做那么多运动了。根据 I haven't done可知,时态是现在完成时,since引导现在完成时,自从,故选B。
【点评】考查连词辨析,注意时间状语从句since的用法。
34.C
【解析】句意:在你做最终决定之前,向你的父母或者老师寻求一些建议是有必要的。because因为,引导原因状语从句;unless除非,如果不,引导条件状语从句;before在……之前, 引导时间状语从句;after在……之后,引导时间状语从句;根据句意可知是指在做决定之前,要向父母或者老师寻求建议,before符合题意,故答案为C。
【点评】考查连词辨析。注意理解句意和选项的意义,找到符合题意的选项。
35.B
【解析】句意:——Jack,你做调查了吗?——还没有。我现在在纽约。我一回来就完成它。A.无论什么时候;B.一......就......;C.在……之前;D.在……之后。I come back是一般现在时,I'll finish it是一般将来时,所以用as soon as,引导时间状语从句,从句用一般现在时,主句用一般将来时,故选B。
【点评】考查连词辨析,首先识记选项意思,然后根据关键词句确定。
36.D
【解析】句意:我的父母亲______我都喜欢吃鸡肉,______我们晚餐总是吃(鸡肉)。第一空:和and。故排除选项B和C。第二空选项A为but但是,前后两句不是转折关系。故排除;选项D为so所以。前后两句可为因果关系。故选D。
【点评】考查连词辨析。
37.C
【解析】句意:——你什么时候知道有一个重要的会议的?——直到珊迪今天早上给我打电话的时候才知道的。since自从,与完成时连用;till直到,not until直到……才;while当……时候,与进行时连用。根据When did you know there would be an important meeting 此处对时间点提问,因此用表示直到某个时间,用于句首时,用until,不用till,故答案选C。
【点评】考查状语从句。注意疑问句的答语中对主句的省略。
38.A
【解析】句意:这个老人想坐在他妻子旁边,所以他让这个女孩坐另一个座位。A.因为,连词,后面接句子;B.因为,介词短语,后面不能接句子;C.所以,连词;D.目的是,连词。因为想坐在妻子旁边,所以让女孩坐另一个座位,表示原因,排除C、D。因为he wanted to sit next to his wife.是句子,所以用because,故选A。
【点评】考查连词辨析,注意平时识记because和because of的区别。
39.C
【解析】句意:——你更喜欢哪一个,茶还是咖啡?——茶。A.但是,表示转折;B.所以,表示结果;C.或者,表示选择;D.和,表示并列。根据答语Tea, please.可知是从茶和咖啡中选择了茶,所以用or,故选C。
【点评】考查连词辨析,注意平时识记but/so、or和and的区别。
40.B
【解析】句意:他们说话很小声以至于我不能听到他们的声音。such…that,如此……以至于,such修饰的中心词是名词,结构为such+a/an+形容词+名词单数+that,或者such+形容词+名词复数/不可数名词;so…that,如此……以至于,so后修饰的中心词是形容词或副词原级,结构为so+形容词/副词that;neither…nor,既不……也不,分析句子可知,这是一个结果状语从句,故排除C,根据 quietly可知,第一空所填的词,修饰的中心词是副词,用so,所有用so…that引导结果状语从句,故选B。
【点评】考查连词辨析。注意识记so…that的词义和用法。
41.C
【解析】句意:不久我们就要离开初中了。A.因为,B.直到,C.在……之前,D.尽管。根据we leave our junior middle school. 我们就要离开初中了,可知应是“不久我们就要离开初中了”,应用“It is+一段时间+before+从句”表示“做某事之前,还有多长时间”,用连词before。故选C。
【点评】考查连词辨析。注意根据前后逻辑,选择合适的连词。
42.C
【解析】句意:玛丽学了很多关于四川的历史,以便于她可以当导游。A.even if即使;B.as soon as…,一…….就……;C.so that以便于。根据she can be a tour guide 可知,这是玛丽学了很多关于四川的历史的目的。so that 引导目的状语从句。故选:C。
【点评】考查连词。熟悉从属连词的用法,结合题意,给出答案。
43.A
【解析】句意:——你认为音乐会怎么样?——棒极了,尽管有一段音乐演奏得不是很好。A.though,连词,尽管;B.because,连词,因为;C.so,连词,所以;D.and,连词,和;“ one piece of the music wasn't played quite well.”与“Great”之间存在让步关系,要表达“尽管有一段音乐演奏的不好,但还是很棒”,though,连词,尽管,引导让步状语从句,故选A。
【点评】考查连词辨析。识记连词though的用法。
44.D
【解析】句意:——你想和我去听音乐会吗?——我想去,但是我怕没有时间。but表转折。
【点评】考查连词辨析。
45.A
【解析】句意:他有一个棒球,但是他没有球棒。表示转折,故选A。
【点评】考查并列连词辨析。
46.A
【解析】考查连词的用法。根据Everyone can make great progress“人人都能取得大的进步”和he works hard“他努力工作”可知二者是条件关系,故答案选A。
47.D
【解析】句意:——托尼,今天下午你打算做什么?——我要呆在家里,因为外面正在下雨。A 和,表并列或顺承;B 因此,表示结果;C 但是,表示转折;D 因为,表示原因。根据语句I'm going to stay at home 与it's raining outside.的关系,后者是前者的原因,表原因用because,故选D。
【点评】考查连词辨析。熟知每个介词的基本含义及它们的区别,根据语境的需要选择最佳选项。
48.A
【解析】句意:有些孩子喜欢吃垃圾食品,尽管这对他们的健康不好。A 尽管,虽然;B 如果;C 像……一样。根据句意,前后两句表示让步关系,故选A。
【点评】考查连词辨析。注意识记让步状语从句的用法。
49.B
【解析】句意:我爸爸正在客厅喝茶,而我妈妈在厨房做饭。A.如果;B.当……时候,而;C.直到;D.除非。这里表示的是一个动作在发生的同时,另一个动作也在发生,应使用while表示对比,故答案是B。
【点评】考查练习辨析,注意识记while的用法。
50.C
【解析】句意:“我听说苏珊将要自己去北京。” “那是真的。她的爸爸和妈妈都不和她一起去。”neither……nor……意为“……和……都不”。根据句意可知应选C。
【点评】考查连词辨析。
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