复习专题名词性从句专项练习题及答案
【英语】英语名词性从句题20套(带答案)含解析
【英语】英语名词性从句题20套(带答案)含解析一、初中英语名词性从句1．It was never clear ________ the man hadn't reported the accident sooner.A. thatB. howC. whenD. why【答案】 D【解析】【分析】句意：这名男子没有早点报告这次事故的原因根本没有搞清楚。
It在句中是形式主语，真正的主语是why引导的主语从句。
故选D。
【点评】考查名词性从句，本题涉及why引导的主语从句。
2．Some people believe _______ has happened before or is happening now will repeat itself in the future.A. whateverB. wheneverC. whereverD. no matter what【答案】 A【解析】【分析】句意：一些人认为之前发生的或现在正在发生的任何事情在将来都会重复发生。
Whatever has happened before or is happening now是一个主语从句，whatever既引导起这个主语从句，也在句中做主语。
BC项都属于副词的性质，都不能做主语，通常只能做状语；no matter what只能用来引导状语从句，故选A。
【点评】考查名词性从句，本题涉及"特殊疑问词+ever"引导的主语从句。
3．_______ are playing an important part is well known to us all.A. That whoB. Those whoC. Who thatD. 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．—Tell me something about your adventure in the rainforest, please.— We lost our way in the forest and ___ made matters worse was ___ night began to fall.A. what; thatB. it; thatC. it; becauseD. what; because【答案】 A【解析】【分析】考查名词性从句的连接词。
必备英语名词性从句专项练习(附答案)含答案解析
必备英语名词性从句专项练习(附答案)含答案解析一、初中英语名词性从句1．____ he will offer us enough help doesn't matter a lot to our success.A. IfB. WhetherC. BeforeD. How【答案】 B【解析】【分析】句意：他是否提供帮助对于我们的成功没有什么关系。
If不可以引导主语从句，故选B。
【点评】考查名词性从句，本题涉及whether引导的主语从句的应用。
2．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.A. That; whatB. What; whichC. It; whichD. As; that【答案】 B【解析】【分析】句意：众所周知，中国已经发射了神州7号宇宙飞船，这是中国首次成功的太空行走。
第一空处为主语从句，从句缺少主语，需用what引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用which引导。
故选B。
【点评】考查名词性从句和定语从句，本题涉及主语从句和非限制性定语从句的应用。
3．______excited Jenny most was ______ she finally succeeded in ______seemed to be the most difficult exam to him.A. That; that; whichB. What; that; whatC. That; because; thatD. 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。
(完整版)名词性从句专项练习及答案
高中英语名词性从句专项练习一、用that或what填空1.______ he wants is a book.2. ______ he wants to go there is obvious.3.The result is ______ we won the game.4.This is _____ we want to know.5.Is _____ he told us true ?6.We should pay attention to ______ the teacher is saying.7. I have no doubt _____ he will come.8. I have no idea _____ he did that afternoon.9._____ has made China_____ it is now?10．we can’t get seems better than we have .11.A computer can only do you instructed it to do .12.He became so angry he couldn't speak .13.There is the city we visited last year .14.There is no doubt the price of cars will go down .15.None of us has a clear idea the others want to do .16.Do he or she tells you to do .17. he did surprised us .18. he did so surprised us .19.This is all I know.20.This is I know.21._____ you have done might do harm to other people.22._____ _ he said at the meeting astonished everybody present.23______ you don't like him is none of my business.24.The fact ____ he is a model teacher is well-known.25.They expressed the hope____ they would come over to China again.二、用if 或whether填空1. I asked her __________ she had a bike.2.______ we will hold a party in the open air tomorrow depends on the weather.3. We’re worried about ________ he is safe.4. I don’t know ___________ he is well or not.5. I don’t know ________ or not he is well.6. The question is _______ he should do it.7.The doctor can hardly answer the question___ _ the old man will recover soon.8. I don’t know _______ to go.9.______ you are not free tomorrow, I’ll go without you.10.It depends on she will come.11.I have no idea he will be back .12.We must stick to our promise or no .13. It is valuable ,I can't say .14.I don’t know he is lying or not.15. I didn’t know to laugh or to cry.三、改正下列句子中的错误，每句一处错。
【英语】名词性从句练习题(含答案)
英语】名词性从句练习题（含答案）一、名词性从句1． He took a trip to Beijing last week and he saw at the Forbidden City impressed himdeeply.A.that B . how C . what D . which 【答案】 C【解析】【分析】句意：上周他到北京旅行了，他在故宫所看到的给他留下了深刻的印象。
分析句子结构可知，连词 and 后为一个名词性从句，因此应该使用 what 引导，且 what 在从句中作主语，故选 C。
【点评】考查名词性从句，本题涉及 what 引导的主语从句。
2． It has been pointed out _ plays a vital role in driving away one's anxiety is one'ssweet childhood memories.A.what thatB. whichC. thatD. that what【答案】 D【解析】【分析】句意：有人指出，驱除焦虑所起着至关重要的作用是童年美好的回忆。
本句时一个主语从句， it 作形式主语，真正的主语为 that what plays a vital role in driving away one's anxiety is one's sweet childhood memories. ，主语从句中又有一个主语从句，且此主语从句中缺少主语，所以用what 引导。
故选 D。
【点评】考查名词性从句，本题涉及 what 引导的主语从句。
3． is clear to the members of the committee is that the President will not give in to their demands.A. Who B . It C . As D . What【答案】 D【解析】【分析】句意：委员会成员清楚的是，总统不会向他们的要求让步。
英语名词性从句专题训练答案及解析
英语名词性从句专题训练答案及解析一、初中英语名词性从句1．_______ caused the accident has not been found out yet.A. WhatB. WhichC. The thingD. That 【答案】 A【解析】【分析】句意：造成事故的原因还没有查明。
此处为主语从句，从句中缺少主语，应该用what引导，故答案为A。
【点评】考查主语从句。
以及what的含义。
2．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.A. That; whatB. What; whichC. It; whichD. As; that【答案】 B【解析】【分析】句意：众所周知，中国已经发射了神州7号宇宙飞船，这是中国首次成功的太空行走。
第一空处为主语从句，从句缺少主语，需用what引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用which引导。
故选B。
【点评】考查名词性从句和定语从句，本题涉及主语从句和非限制性定语从句的应用。
3．Some people believe _______ has happened before or is happening now will repeat itself inthe future.A. whateverB. wheneverC. whereverD. no matter what 【答案】 A【解析】【分析】句意：一些人认为之前发生的或现在正在发生的任何事情在将来都会重复发生。
Whatever has happened before or is happening now是一个主语从句，whatever既引导起这个主语从句，也在句中做主语。
高中英语名词性从句专题复习练习100题(附答案)
名词性从句专项练习100题1. His success was because of ________ he had been working hard.A. thatB. the fact whichC. the fact thatD. the fact2. “Is Mary from New York City” “I don't know _______.”A. from what city does she come fromB. from what city she comeC. what city does she come fromD. what city she comes from3. ________ makes mistakes must correct them.A. WhatB. ThatC. WhoeverD. Whatever4. The reason why I didn't go to Shanghai was ________ a new job.A. because I gotB. because of gettingC. I gotD. that I got5. It worried her a bit ____ her hair was turning grey.A. whileB. thatC. ifD. for6. Henry killed the dog. I'll ask him why ________.A. did he do thatB. he did thatC. he didD. he has done so7. Have you seen Henry lately My boss wants to know ________.A. how he is getting alongB. how is he getting alongC. what he is getting alongD. what is he getting along8. It is generally considered unwise to give a child ____ he or she wants.A. howeverB. whateverC. whicheverD. whenever9. He asked me ________ with me.A. what is the troubleB. what wrong wasC. what was the matterD. what trouble it is10. I am sure ________ he said is true.A. thatB. about thatC. of thatD. that what11. When and why he came here ________ yet.A. is not knownB. are not knownC. has not knownD. have not bee12. I wonder how much ________.A. does the watch costB. did the watch costC. the watch costedD. the watch costs13. Mary is ________ someone might recognize her.A. afraid ofB. afraid aboutC. afraid thatD. afraid for14.________ is no reason for dismissing her.A. Because she was a few minutes lateB. Owing to a few minutes lateC. The fact that she was a few minutes lateD. Being a few minutes late15. They came to the conclusion ________ by a computer.A. that not all things can be doneB. because of not all things be doneC. being not all things can be doneD. because not all things can be done16. Why the explosion occurred was ________ the laboratory attendant had been careless.A. forB. becauseC. sinceD. that17. I don't doubt ________ he'll come.A. thatB. ifC. whatD. whether21. ______ surprised me most was ______ such a little boy of seven could play the violin so well.A. That…whatB. What…thatC. That…whichD. What…which22. We gave him ________ help we could.A. whichB. whatC. thatD. this23. She is pleased with what you have given him and ________ you have told him.A. thatB. whichC. all whatD. all that18. —“Why did you go to the wrong class, Mr. Wang”—“Well, I forget _______ I was supposed to go to.”A. which the roomB. which roomC. what was the roomD. what room was it19. Output is now six times ________ it was before liberation.A. thatB. whichC. whatD. of which20. Mary: Helen is a mere washer woman, yet she's now buying a big house.Carol: Yes. Because she's always saved ________.A. what little she earnsB. how little she earnsC. for little she earnsD. with little she earns26. This book will show you ________ can be used in other contexts.A. how you have observedB. how what you have observedC. that you have observedD. how that you have observed27. Where do you think ________A. has he goneB. has he beenC. he's goneD. was he24. Excuse me would you please tell me ________A. when the sports meet is taken placeB. when is the sports meet going to be heldC. when is the sports meet to beginD. when the sports meet is to take place25. Do you happen to know ________A. what size shoes he wearsB. how big shoes he wearsC. what is the size of his shoesD. what number shoes are his31. ________ I think he is Charles.A. Who do you think he isB. Do you think who he isC. Whom do you think he isD. Do you think who he is28. Do you know ________A. how many populations there are in the worldB. how much population there is in the worldC. how many the population of the world isD. what the population of the world is29. Would you go and see ________ outsideA. what to take placeB. what Tom has happenedC. what is happeningD. what the matter had been30. The subject of "What is interesting is that I do not even know him." is_______.A. whatB. interestingC. What is interestingD. I36. ________ we go swimming every day ________ us a lot of good.A. If…doB. That…doC. If…doesD. That…does37. ________ was the idea _______ the wife thought ofA. What…thatB. That…whatC. How…whyD. Why…how38. _______ did he tell his wife ________ he wished to doA. That…whatB. What…thatC. Where…whichD. Which…where32. He didn't know which room ________.A. they livedB. they lived inC. did they liveD. did they live in33. The little boy ate ________ his mother gave him.A. thatB. whichC. whateverD. no matter what34. The city is no longer ________.A. what it isB. that it used to beC. which it wasD. what it used to be35. My parents used ________ they had to get a new car for me.A. whichB. thatC. whatD. all what42. Is this ________ we met each other two years agoA. placeB. place in whichC. whereD. place which43. It ________ Bob drives badly.A. thinks thatB. is thought whatC. thought thatD. is thought that44. We all know the truth ________ there are air, water and sunlight there are living things.A. whereB. whereverC. thatD. that wherever39. One of the men held the view ________ the book said was right.A. what thatB. that whatC. that whichD. which that40. I have no idea ________ or not he has finished the work.A. ifB. thatC. whetherD. which41. —“Do you know ________”—“His father is a doctor.”A. what is his fatherB. who is his fatherC. what his father isD. who his father is48. He said that he was fond of ________.A. what beautiful isB. what is beautifulC. beautiful is whatD. what it is beautiful49. He insisted that he ________ in good health and _______ to work there.A. was, be sentB. is, is sentC. be, was sentD. be, send45. They discussed ________ they could settle the problem without others' help.A. ifB. thatC. whatD. whether46. She asked ________.A. what I was doing when she rang me upB. what was I doing when she rang me upC. when she rang me up what I was doingD. when did she ring me up what I was doing47. —May I borrow the ring—You can take _______ you like.A. no matter whatB. whichC. whicheverD. that53. ________ is to do good all one's life and never do anything bad.A. Whichever is hardB. No matter what is hardC. What is hardD. All what is hard54. ________ the boy didn't take medicine made his mother angry.A. ThatB. WhatC. HowD. Which50. Do you know ________ he expects will give us a talkA. whoB. whomC. thatD. whose51. It's uncertain ________ the experiment is worth doing.A. ifB. thatC. whetherD. how52. They would have fixed the telephone yesterday _________ it was a holiday.A. exceptB. except forC. except thatD. but for59. ____ we'll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where60. ________he really means is ________he disagrees with us.A. What … thatB. That … whatC. Why … thatD. If … what61. _________is going to do the job will be decided by the Party committee.A. ThatB. WhyC. HowD. Who55. As the day was fine, I made the suggestion ________ for a walk in the park.A. we goB. we will goC. should we goD. that we go56. ____ we can't get seems better than ____ we have.A. What, whatB. What, thatC. That, thatD. That, what57. ____ you don't like him is none of my business.A. WhatB. WhoC. ThatD. Whether58. You can't imagine ____ when they received these nice Christmas presents.A. how they were excitedB. how excited they wereC. how excited were theyD. they were how excited66. _______ makes mistakes must correct them.A. WhoB. AnyoneC. WhoeverD. Anybody67. _______ team will win the match is a matter of public concern.A. WhichB. ThatC. IfD. How68.Three days later, word came ________our country had sent up another man-made satellite.A. whichB. whenC. thatD. where69.The problem is ________will go to the meeting.A. whyB. whenC. whatD. who62. _______ we'll finish translating the book depends on the time.A. WhenB. WhyC. WhatD. That63. _______ the house will be built will be discussed at tomorrow's meeting.A. IfB. WhereC. ThatD. What64. _______ he won't go there is clear to all of us.A. HowB. WhatC. WhyD. This65. _______ you come or not is up to you.A. WhatB. IfC. WhyD. Whether74.The fact _______ she had not said anything surprised all of us.A. whichB. whatC. thatD. how75.What I'm considering now _________ the money we need.A. isB. areC. wereD. was76.Can you tell me __________A. who is that gentlemanB. that gentleman is whoC. who that gentleman isD. whom is that gentleman70.It looks _______ it were going to rain.A. even ifB. as ifC. even thoughD. like71.That is _______ he likes the place so much.A. thatB. whatC. whyD. how72.That is ______ Lu Xun once lived.A. whatB. whereC. thatD. why73. We thought _______ strange that Tom did not come yesterday.A. thatB. itC. thisD. what80. Jack was soon told ________ he did was not necessary.A. whyB. thatC. howD. why what81. We should think carefully about ________ Mr. Needham said at the meeting.A. thatB. whatC. whichD. X82. Can you point out ________ two radios are the bestA. whichB. whatC. thatD. whether77. ________leaves the room last ought to turn off the lights.A. AnyoneB. The personC. WhoeverD. Who78. It is well known _________ a person eats causes changes in the body.A. that what, when, and howB. thatC. whatD. how79. The energy is ________ makes the cells able to do their work.A. thatB. whichC. whatD. such86. She took it for granted ________ I'd be back home an hour ago.A. thatB. whetherC. ifD. when87. We think it possible ________ the local government will be able to solve the housing problem.A. forB. thatC. whenD. how83. You will easily know ________ video recorders (录相机) are the same.A. what thoseB. that of thoseC. that all ofD. which of those84. ________ you have seen things like these before doesn't matter.A. IfB. WhetherC. WhatD. When85. I asked her in English ________ she was, and she told me ________ she was an actress.A. who…thatB. who…XC. what…XD. how…that91. Last Sunday he made a promise ________ he was free he would take me to Qingdao.A. ifB. thatC. that ifD. whether92. Do you have any idea ________A. when Miss Smith will arriveB. when will Miss Smith arriveC. how will Miss Smith arriveD. why hasn't Miss Smith arrived88. Now there is a danger ________ the ground may fall in (沉下) under the heavy traffic.A. whetherB. ifC. XD. that89. At that time I had no idea ________ I could hand it to him without being seen.A. ifB. howC. whichD. that how90. Last Sunday he promised ________ today, but he hasn't appeared yet.A. that he would comeB. that he will comeC. he will come to see meD. whether he would come95. Do you know ________A. what is this used forB. what this is used forC. which this is usedD. that this is used for96. ________ surprised me most was ________.A. That…that she spoke Japanese so wellB. What…how could she speak Japanese so wellC. What…that she spoke Japanese so wellD. That…why she could speak Japane se so well93. I have almost forgotten ________.A. how Mr. Taylor's likeB. what Mr. Taylor's face is likeC. what Mr. Taylor's face isD. which Mr. Taylor's face is like94. The true value of life is not in ________, but ________.A. how you get …that you giveB. which you got what you giveC. what you get …what you giveD. what do you get…what do you give99. These computers are different from ________.A. that we expectedB. what we expectedC. which we have expectedD. what we expect100. ________ Tom liked to eat was different from ________.A. That…that you had expectedB. What …that you had expectedC. That…what you had expectedD. What…what you had expected97. ________ is to dance.A. That interests Mary reallyB. Which really interests Mary.C. What really interests MaryD. What really interest Mary98. We were greatly amused by ________.A. what you have told usB. which you had told usC. what you told usD. that you told us1-5.CDCDB 6-10.BABCD 11-15.ADCCA 16-20.DABCA 21-25.BBDDA 26-30.BCDCC 31-35.ABCDC 36-40.DABBC DDD 46-50.ACBAA CAD 56-60.ACBBA 61-65 DABCD 66-70 CACDB 71-75 CBBCA 76-80 CCCCD 81-85 BADBC 86-90 ABDBA 91-95 CABCB 96-100 CCCBD。
名词性从句练习题及答案
名词性从句复习——练Ⅰ.单句语法填空1．Exactly ________ the potato was introduced into Europe is uncertain, but it was probably around 1565．答案：when 句意：土豆被引入欧洲的确切时间不能确定，但很可能是1565年左右。
分析句子结构可知，设空处为主语从句的引导词，从around 1565判断，这里指时间，故填when。
2．It shocked the world ________ the United States withdrew from some major agreements it had been committed to, including the 2015 Paris Agreement on climate change and the 2015 Iran Nuclear Deal．答案：that 句意：令世界震惊的是，美国退出了它所承诺的一些主要协议，包括2015年《巴黎气候变化协定》和2015年《伊朗核协议》。
此处it是形式主语，真正的主语是that 引导的主语从句。
3．I need help now! I have to fix a leaking pipe in my bathroom but I'm not sure ________ to begin．@答案：where 句意：我现在需要帮助！我不得不修理洗手间里一个正在漏水的管子，但是我不确定从何处着手。
此处表示是管子哪里漏水，表示地点，填where。
4．Forty grams of meat per day is ________ people should consume in order to stay fit．答案：what 句意：为了保持健康，人们每天应该消耗40克肉。
“________ people should consume”是表语从句，该从句中，consume缺少宾语，且表示“所……的东西”，故要用what引导该从句。
(英语)英语名词性从句练习题20篇含解析
（英语）英语名词性从句练习题20篇含解析一、初中英语名词性从句1． is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. 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。
2．___ surprised me most was ____the girl passed the driver test.A. That; thatB. What; howC. What; thatD. 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。
3． is clear to the members of the committee is that the President will not give in to their demands.A. WhoB. ItC. AsD. What【答案】 D【解析】【分析】句意：委员会成员清楚的是，总统不会向他们的要求让步。
that the President will not give in to their demands.这个句子作表语； is clear to the members of the committee这是主语从句，这里缺少主语从句的连接词，并且连接词在句中作主语，it是代词，不是了；连接词，故排除B；as作主语时，是在定语从句中，故排除C；who指人，根据表语指的事情，不是人，故排除A；what在主语从句中可以作主语或宾语，指事，符合句意，故选D。
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复习专题名词性从句专项练习题及答案一、初中英语名词性从句1． is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. 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。
2．Has it been announced ______?A. when are the planes to take offB. that are the planes to take offC. where are the planes to take offD. 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。
3．In the past decade, our education system too much on grades. However, grades have a direct connection with future success is still a question.A. focused; whetherB. focused; ifC. has focused; whetherD. has focused; if【答案】 C【解析】【分析】考查时态和主语从句。
根据In the past decade,在最近的几十年里，可知句子用现在完成时态，our education system是句子的主语，单数形式，所以第一空填has focused；第二空是主语从句做主语，if是否，不能引导主语从句，所以第二空填whether。
故选C。
【点评】主语从句主要有三类：1）（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。
例如：That you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。
（2）用连词whether 引导的主语从句:whether有含义（是否）,在句中不做成分,不可以省。
例如：Whether she is coming or not doesn't matter too much.她来不来都无关紧要。
注意：if不能引导主语从句。
2）用连接代词引导的主语从句（在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分）.例如：What you need is more practice.你所需要的是更多的训练。
3）用连接副词when, where, why, how引导的名词性从句（其连接副词有含义,在句中作状语。
）例如：Where we should leave it is a problem.4．____ made me more unhappy was ___ the boy asked my friend to be his girlfriend and she agreed.A. What; thatB. That ; thatC. What; whetherD. 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。
5．______ amazed the NBA world is ______ Kobe Bryant scored 81 points just in one game.A. That, whatB. What, thatC. That, thatD. What, what【答案】 B【解析】【分析】句意：使NBA世界惊讶的是Kobe Bryant在一场比赛中得了81分。
根据句意可知，句子主语是一个主语从句，引导词即起引导作用又要做从句的一个成分，所以第一空填What；第二空是that引导的表语从句，只起引导作用，故选B。
【点评】考查名词性从句，本题涉及关系代词what引导的主语从句和表语从句的应用。
6．Exactly _________ the potato was introduced into Europe is uncertain, but it was probably around 1565.A. whetherB. whenC. whyD. how【答案】 B【解析】【分析】句意：土豆被引进欧洲具体的事件不被确定，但是可能是在1565年左右。
根据时间状语round 1565得知这里是指时间不确定。
故选B。
【点评】考查名词性从句，本题涉及when引导的主语从句。
7．_______ makes me feel worried is _______ singing stars are centered on by masses of teenagers today.A. What; whatB. That; thatC. What; thatD. That; what【答案】 C【解析】【分析】句意：让我感到担忧的是，今天的歌星是以青少年为中心的。
分析句子可知，主语从句中的谓语动词makes 缺少主语，主语从句中缺少宾语一般用what，因此选择 what 来引导主语从句；系动词 is 后面的表语从句句意完整，不缺少成分，因此选择 that 引导表语从句。
分析选项可知C项符合题意，故选C。
【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的表语从句的应用。
8．_______ is troubling me is ______ I don't understand ________ he saidA. What; that; whatB. What; what; whatC. That; that; whatD. Why; that; which 【答案】 A【解析】【分析】句意：我烦恼的是我不明白他说的话。
第一空是主语从句，从句中缺主语，要用What；第二空是表语从句，从句不缺成分，所以要填that；第三空是宾语从句，从句中的动词understand缺宾语，要填what。
故选A。
【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的应用。
9．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties.A. As; whoseB. It; whoseC. As; whomD. It; whom【答案】 D【解析】【分析】句意：我们都知道，那位老科学家，过去生活很艰苦，到了八十多岁还在努力工作。
第一空it is known to us all that…是个固定句型，意为“众所周知…”；第二空为介词+关系代词引导的定语从句，先行词the old scientist指人，作介词for的宾语，只能用whom，故选D。
【点评】考查名词性从句和定语从句，本题涉及固定句式it is known to us all that…和whom引导的限制性定语从句。
10．He took a trip to Beijing last week and ________ he saw at the Forbidden City impressed him deeply.A. thatB. howC. whatD. which【答案】 C【解析】【分析】句意：上周他到北京旅行了，他在故宫所看到的给他留下了深刻的印象。
分析句子结构可知，连词and后为一个名词性从句，因此应该使用what引导，且what在从句中作主语，故选C。
【点评】考查名词性从句，本题涉及what引导的主语从句。
11．The question new measures should be taken to control the terrible air pollution is puzzles scientists a lot.A. that; whatB. which; thatC. what; whatD. that; that【答案】 C【解析】【分析】句意为：应该采取什么样的新措施来控制空气污染的问题，是让科学家非常困惑的事情。
第一空根据主语question，可知措施并不明确，应该指“什么样的new mea sures”，关系词应用what；第二空，be动词is后的表语从句缺少主语，应用关系词what，故选C。
【点评】考查同位语从句。
注意that引导同住语从句时，在句中不做成分，也没有词义。
12．We believe ________ you have been devoted to ________ naturally of great necessity.A. that; beingB. all that; beC. that all; areD. 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。
13．It is clever ______ you ______ out the problem.A. for; to workB. of; workingC. for; workingD. of; to work【答案】D【解析】【分析】it可指代下文内容做形式主语，其主要有两种形式：1、It's + 形容词 + of + sb + to do sth.这个句型，形容词一般为sb的所具有的一种品质性格。