一、名词性从句
1．______ has caused great confusion is ______ he made it without anyone else's help.
A. What; that. B. What; how. C. It; how. D. It; that.
【答案】 B
【解析】【分析】句意：让人极大困惑的是他如何在没有别人帮助的情况下做到这一点的。表示“让人困惑的事情”用what引导主语从句，表示“如何做到的”用how表方式，引导表语从句。故选B.
【点评】考查名词性从句，本题涉及what引导的主语从句和how引导的表语从句。
2． is even more important is the earth cooled down, water began to appear on its surface.
A. When; that; when B. What; whether; as C. What; that; as D. lt; whether; as
【答案】 C
【解析】【分析】这题考查从句的用法，第一空填what引导主语从句，在主语从句中what做主语，第二空填that引导表语从句，在表语从句中，as是引导时间状语从句，句意是：甚至更重要的是：随着地球的冷却，水开始出现在表面。选C。
3．_______ are playing an important part is well known to us all.
A. That who B. Those who C. Who that D. Who
【答案】 D
【解析】【分析】考查主语从句。句意：谁起着重要作用，这是众所周知的。主语从句缺少引导词，从句缺少主语，故选D。
4．Has it been announced ______?
A. when are the planes to take off B. that are the planes to take off
C. where are the planes to take off D. when the planes are to take off
【答案】 D
【解析】【分析】句意: 飞机什么时候起飞已经宣布了吗？此处是when引导的主语从句，且要用陈述句语序，故选D。
【点评】考查名词性从句，it作形式主语，关系副词when引导的从句作真正的主语。
5．--- made her ashamed of herself?
--- the lowest mark in her class.
A. What; Because she got B. Was it what; Getting
C. What was it that; That she got D. What was it that; Get
【答案】 C
【解析】【分析】句意：——是什么让她对她自己感到羞愧？——是她获得了她班上的最低分让她惭愧。A中的what是句子的主语，但是because引导的从句不作主语，是原因状语从句，故排除；B的第一空是错误形式，故排除；C、D两项的第一个选项是一样的，说明第一个题干是一个强调句型，特殊疑问句下的强调句型，有what引导；第二个空是对what的回答，因为what是上一句的主语，That she got the lowest mark in her class是从句，可以作主语；而D项的get是动词原形，不能作主语，故答案为C。
【点评】考查强调句型的使用和对特殊疑问句的回答，注意问什么回答什么，也就是说疑问词what是句子的主语，回答的内容也需要在句子中能作主语。
6．____ made me more unhappy was ___ the boy asked my friend to be his girlfriend and she agreed.
A. What; that B. That ; that C. What; whether D. It; that
【答案】 A
【解析】【分析】句意：让我更不高兴的是那个男孩要求我的朋友做他的女友，她同意了。第一空填what,它一方面在句子中引导主语从句,另一方面又在主语从句中作主语；第二空用that引导表语从句且从句中不缺成分,表示对前面情况的说明。故选A。
【点评】考查了名词性从句，本题涉及what引导的主语从句以及that引导的表语从句。
7．It is a rule in his family that _______ comes home first should cook the dinner.
A. anybody B. who C. whoever D. who that
【答案】 C
【解析】【分析】句意：在他的家里有个规定，就是先到家的人要先做饭。 whoever 有两个词义：1no matter who，在这种用法时引导一个让步状语从句；2anybody that，在这种用法时，它连接一个名词性从句，在本题中它连接的是主语从句。这里就是第二个用法。所以选C。
8．_______ you don't like him is none of my business.
A. What B. Who C. That D. Whether
【答案】 C
【解析】【分析】句意：你不喜欢他，跟我没有什么关系。you don't like him为主语从句，其内容已经是完整的，所以用that，且引导主语从句的that不能省略。
9．________ we may find interesting is that it usually takes more to be polite.
A. That B. What C. Which D. /
【答案】 B
【解析】【分析】句意：我们可能会发现有趣的是通常需要更多的礼貌。此处是主语从句做主语，从句没有引导词，缺少宾语，故答案为B。
【点评】考查名词性从句，本题涉及what引导的主语从句的应用。
10．____________ matters most in learning English is enough practice.
A. Why B. That C. Which D. What
【答案】 D
【解析】【分析】句意：学习英语中最重要的是有足够的练习。A. why为什么；B. that引导名词性从句只起引导词作用，不充当成分；C. which哪一个；D. What什么。根据语境用what引导主语从句，并在句中做主语。故答案选D。
【点评】考查主语从句的引导词。主语从句属于名词性从句的一种，填哪个连接词要分析从句缺少什么成分，然后确定所选的词。
11．________ his failure lies is expected ________ clear to us.
A. What… to make B. How… made C. Where… to be made D. Why… making
【答案】C
【解析】【分析】句意：他的失败之处有可能被我们弄清楚。分析句子可知，主语从句中的lie为不及物动词，所以主句中缺少状语，因此填where。expect sth.to do.固定短语，“期望某事发生”，sth. be expected to do.意为”某事有可能发生“。make sth. clear to sb为固定搭配，意为“向某人阐明某事，使某人弄清某事”。本句中make的宾语是where his failure lies是被弄清楚，要用动词不定式的被动形式。因此选C。
【点评】考查名词性从句及固定搭配，本题涉及主语从句和固定短语expect sth.to do.
12．______excited Jenny most was ______ she finally succeeded in ______seemed to be the most difficult exam to him.
A. That; that; which B. What; that; what C. That; because; that D. What; because; which
【答案】 B
【解析】【分析】句意：珍妮最兴奋的是对他来说似乎是最困难的考试，她终于成功了。 ______excited Jenny most是主语从句，从句中缺少主语，因此用关系代词what ； _____ she finally succeeded in ...是表语从句，从句中不缺少成分，因此用引导词that； ______seemed to be the most difficult exam to him. 是宾语从句，从句中缺少主语，因此用关系代词what ， 故选B。
【点评】考查名词性从句，本题涉及主语从句，表语从句和宾语从句。
13．_______is known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.
A. It; that B. What; that C. As; which D. What; which
【答案】 B
【解析】【分析】句意：我们都知道，Johnson违背了他会尽快来帮助我的诺言。分析句子结构可知，第一空为主语从句，从句中缺少主语，所以用what，第二空为同位语从句，从句结构完整，所以用that解释promise的内容，故选B。
【点评】考查名词性从句，本题涉及主语从句和同位语从句。
14．___ surprised me most was ____the girl passed the driver test.
A. That; that B. What; how C. What; that D. That; why
【答案】 C
【解析】【分析】句意：最让我吃惊的是那个女孩通过了驾驶考试。 ___ surprised me most 是一个主语从句，从句中缺少主语，故填what； ____the girl passed the driver test是一个表语从句，句中不缺少成分，故填that。因此选C。
【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的表语从句。
15．_________ is known to all is that the earth is smaller than the sun.
A. As B. What C. It D. Which
【答案】 B
【解析】【分析】句意：众所周知，地球比太阳还小。复合句的主语是一个名词性从句，从句没有引导词和主语，表示“所……的（事）”，故用what引导，其双重作用，故选B。
【点评】考查名词性从句，本题涉及what引导的主语从句。
16．_______ has not been decided next.
A. How to do B. What to do next C. To do what D. To do how
【答案】 B
【解析】【分析】句意：接下来做什么还没有决定。根据助动词has可知前面是主语，what to do为名词性从句，可做主语，故选B。
【点评】考查名词性从句，识记名词性从句做主语的用法。
17．We believe ________ you have been devoted to ________ naturally of great necessity.
A. that; being B. all that; be C. that all; are D. what; is
【答案】 D
【解析】【分析】句意：我们相信你所投入的当然是非常必要的。分析句子可知，believe后接宾语从句，宾语从句中you have been devoted to缺少宾语，表示事物故用what；what you have been devoted to为主语，从句作主语，谓语动词用单数，故选D。
【点评】考查名词性从句和主谓一致，本题涉及what引导的主语从句和一般现在时。
18．You will never guess ________.
A. who am I waiting for B. what has happened
C. how can she help me D. where did I go
【答案】 B
【解析】【分析】句意：你永远不会猜到发生了什么事。宾语从句用陈述句语序，故A、C、D错，happen的主语是所发生的事情，其结构是：sth happen to sb，所以what has happened中what指事，是主语，句子是陈述句语序。故选B。
19．—Hey,you look worried. What's up?—I'm not sure__________
A. that can I pass the exam or not
B. If I can pass the exam or not
C. Whether I can pass the exam or not
【答案】C
【解析】【分析】句意：-嗨，你看起来很担心，怎么了？-我不确定我是否能通过这场考试。“Whether……or not”属固定搭配，意为是否……其余连接词无用法。故选C。
【点评】考查Whether引导的名词性从句。
20．— Doctor, it seems ______ you like to work with animals.
— Yes, we should________ animals as our friends.
A. that; regard B. what; be regarded C. that; be regarded D. what; regard
【答案】 A
【解析】【分析】句意：—医生，看起来你喜欢和动物一起工作。—是的。我们应该把动物看做我们的朋友。It seems + that从句，其中it 是形式主语，that引导主语从句。Regard---as---（把------看做------）。故选A。
【点评】此题考查主语从句和固定搭配regard---as---。
21．You have spent too much time playing computer games.That's________ your eyes hurt.
A. why B. how C. what D. when
【答案】 A
【解析】【分析】句意：你已经花了太多的时间玩电脑游戏。那就是为什么你眼睛疼。why：为什么，why your eyes hurt做is的表语，how：怎样，what：什么，when：什么时候，故选A。
【点评】考查表语从句。根据语境选出恰当的连接词。
22．It is still unknown how AI（人工智能）_______the way of our life as well as the world.
A. change B. changed C. will change D. was changing
【答案】C
【解析】【分析】句意：人工智能将会怎么改变我们的生活方式和整个世界仍旧不为人所知。It是形式主语，真正的主语是后面how引导的从句，为主语从句。主句是一般现在时态，人工智能改变世界是没有发生的事情，用一般将来时态，其结构是will + 动词原形，故选C。
【点评】考查主语从句的时态。注意主句是现在时或者将来时，从句用任何需要的时态。
23． breaks the school windows will be in for trouble.
A. Whoever B. Who C. Which D. Whose
【答案】 A
【解析】【分析】句意：无论谁打破学校的窗户都会有麻烦的。A. Whoever无论谁，任何人，指人；B. Who 谁；指人C. Which哪一个，指物D. Whose谁的，引导句中时后面常跟所修饰的名词，根据句中结构此处缺少主语，指人，whoever放在句中句子才通顺，who放在句中句子翻译不通，故选A。
【点评】此题考查名词从句的引导词辨析。注意根据句子结构和句意确定所选的引导词。
24．—I'll have a ten-day holiday. But I don't know ________.
—How about Paris?
A. when to go B. where to go C. what to do
【答案】 B
【解析】【分析】句意：——我将有10天的假。但是我不知道去哪里？——巴黎如何？A.when to go什么时候去，B.where to go去哪里，C.what to do做什么。根据后文提到去巴黎，可知是对地点提问，用where，填入where to go，故选B。
【点评】考查名词从句，注意where to go的用法。
25．That is _____we were late last time.
A. that B. when C. why D. what
【答案】 C
【解析】【分析】句意：这就是上次我们为什么迟到的原因。A.没有实际意义；B.当......时候；C.为什么；D.什么。为什么迟到，用why，引导名词性从句，做表语，故选C。
【点评】考查表语从句连接词用法，注意理解句意。
26． doesn't matter you come or not.
A. That; whether B. It; whether C. That; if D. It; if
【答案】 B
【解析】【分析】句意：你来不来无关紧要。根据句末or not，要用连词whether；有句子结构可知，此处是whether引导主语从句，放在句末，用it作形式主语。故选B。
【点评】考查连词和代词辨析。根据句子结构，选择正确的一项。
27．The place the bridge is supposed to be built should be the cross-river traffic is the heaviest.
A. which; where B. at which; which C. at which; where D. which; in which
【答案】 C
【解析】【分析】句意：桥梁应该建在水上交通最繁忙的地方。定语从句，代指地方，用where/介词+which，根据the place，可知前面用介词at，表示在……地方，做地点状语，介词提前，因此用at which；根据 the cross-river traffic is the heaviest，可知是对桥所在地点的描述，因此用where，引导表语从句，故选C。
【点评】考查定语从句与表语从句的引导词。
28．Is this school they visited the other day?
A. that B. which C. where D. the one
【答案】 D
【解析】【分析】句意：这就是几天前他们参观的那间学校吗？根据 Is this school they visited the other day? ，可知主句中缺表语，应用the one指代this school；再根据 they visited the other day? ，可知在the one后边紧跟的是that引导的定语从句，that句中做visit的宾语故省略。故选D。
【点评】考查表语从句和定语从句。注意关系词that在从句中做宾语时可省略。
29．Could you tell me ______ yesterday afternoon?
A. when the school sports meeting ended B. when did the school sports meeting end
C. when the school sports meeting ends D. when does the school sports meeting end
【答案】 A
【解析】【分析】句意：你能告诉我昨天下午学校学校运动会什么时候结束的吗？could you tell me后接宾语从句，用陈述语序，疑问词+主语+谓语，因此排除B、D；根据yesterday afternoon，昨天下午可知，此句是过去时态，故选A。
【点评】考查过去时态。注意时间状语的表达，判断出时态，选出正确答案。
30． is known to all is that the earth is smaller than the sun.
A. As B. What C. It D. Which
【答案】 B
【解析】【分析】句意：众所周知地球比太阳小。 is known to all 是主语从句，从句中缺少主语，因此用what，选B。
【点评】考查名词性从句，本题涉及what引导的主语从句。下载本文
