名词性从句测试题及答案1
2020-2021年《名词性从句》单元测试题(含答案) 经典1
2020-2021年《名词性从句》单元测试题(含答案) 经典1一、名词性从句1．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。
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。
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。
名词性从句练习题及答案
名词性从句练习题及答案1. 主语从句：It is important that you finish your homework on time.- 答案：It is important that you finish your homework on time. (这是正确的句子结构，主语从句是 "that you finish your homework on time".)2. 宾语从句：I believe that he will succeed.- 答案：I believe that he will succeed. (宾语从句是 "that he will succeed".)3. 表语从句：The fact is that we have run out of time.- 答案：The fact is that we have run out of time. (表语从句是 "that we have run out of time".)4. 同位语从句：The news that he won the prize is exciting.- 答案：The news that he won the prize is exciting. (同位语从句是 "that he won the prize".)5. 宾语从句的疑问形式：What did he say he would do?- 答案：What did he say he would do? (宾语从句的疑问形式是"what he said he would do".)6. 宾语从句的否定形式：I don't think that he is honest.- 答案：I don't think that he is honest. (宾语从句的否定形式是 "that he is honest".)7. 宾语从句的省略：He promised to help us.- 答案：He promised to help us. (宾语从句的省略形式是"promised to help us".)8. 宾语从句的连接词：Whoever breaks the law will be punished. - 答案：Whoever breaks the law will be punished. (连接词是"whoever".)9. 宾语从句的时态：I heard that she had left the city.- 答案：I heard that she had left the city. (宾语从句使用了过去完成时 "had left".)10. 宾语从句的虚拟语气：I suggest that he study harder.- 答案：I suggest that he study harder. (宾语从句使用了虚拟语气 "study".)结束语通过这些练习题，学生可以加深对名词性从句的理解，提高在实际语境中运用这些从句的能力。
英语名词性从句练习题20篇及解析
英语名词性从句练习题20篇及解析一、初中英语名词性从句1．______makes the school proud is______more than90%of the students have been admitted to universities.A.what;becauseB.that;becauseC.that;whatD.what;that 【答案】D【解析】【分析】句意：让学校骄傲的是，超过90%的学生被重点大学所录取。
第一空主语从句中缺少主语，指代事情，故用what;第二空为表语从句，且从句中不缺少成分，故填关系词that。
故选D。
【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。
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．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。
名词性从句专项练习及答案解析
名词性从句专项练习及答案解析概述名词性从句是由一个引导词引导的从句，充当名词的成分。
在英语中，名词性从句主要包括以下四种：主语从句、宾语从句、表语从句和同位语从句。
掌握名词性从句的用法对于提高英语写作和阅读能力至关重要。
本文将提供一些名词性从句的练习题，并附有详细的答案解析，帮助读者更好地掌握名词性从句的用法。
练习题题目一：选择最佳答案1.I don’t know ________. A. where does he live B. where he lives C. wherehe does live D. where lives he2.She is the girl ________ I met yesterday. A. who B. whom C. which D.whose3.________ is important to have a balanced diet. A. It B. What C. That D.This4.I am not sure ________. A. when will they arrive B. when they will arriveC. when did they arriveD. when do they arrive5.Can you tell me ________? A. how much is it B. how much it is C. howmany is it D. how many it is题目二：完成句子1.________ is necessary for you to practice English every day. (it)2.We didn’t know ________. (where)3.That is the reason ________. (why)4.Do you remember ________? (what)5.________ will go with you tomorrow. (who)题目三：改错1.I don’t know where does he live.2.She is the girl who I met yesterday.3.That is the reason that she was late.4.Can you tell me what time is it?5.I am not sure when did they arrive.答案解析题目一：选择最佳答案1. B. where he lives 解析：名词性从句作know的宾语，从句中用陈述句语序。
高中英语名词性从句练习100题(附答案)(1)
名词性从句练习100题1. Nowadays consumers become more and more practical and buy only ______ they need.A. whereB. whichC. whenD. what2. S he’d like to offer money to _______ needs it to continue his or her study.A. whoB. whomC. whoeverD. whomever3. ---If you are admitted to a key university, _________ as a prize?--- I’m looking for a cell phone.A. What you expect your father will offer youB. Do you expect what your father will offer youC. What do you expect will your father offer youD. What do you expect your father will offer you4. Yesterday he sold out all his stamps at ____ he thought was a reasonable price.A. thatB. whichC. whatD. as5. Generally speaking, __we have seen seems more believable than ___ we have been told.A. what; thatB. what; whatC. that; whatD. that; that6. After three days’ waiting, there was a little doubt in the mother’s mind _____ the police could find her lost child. A. how B. that C. where D. whether7. “Sustainable development” is a question ____ we can continue developing the worldwithout damaging the environment. A. why B. when C. that D. how8. We’d like to do _______ we can _______ the poor.A. how; helpB. all; to helpC. whatever; helpD. however; to help9. My parents used ________they had to get a new car for my brother.A. whichB. all whatC. whatD. 不填10. She was so angry at all ________ he was doing _________ she stayed up all night.A. that; thatB. that; whichC. what; thatD. what; as11. After _________ seemed ages, the newsman disclosed the facts.A. thereB. whichC. whatD. that12. Our school is no longer ____ it was 10 years ago, ______ it was not well equipped.A. what; whichB. that; whichC. what; whenD. that; where13. Our bad living habits will destroy the earth. Only by changing _____we live can wesave the earth. A. that B. what C. how D. where14. Thinking that you know _________ in fact you don’t is a serious mistakeA. whatB. thatC. whenD. however15. Energy is _________ makes things work.A. whatB. everythingC. somethingD. anything16. One of the men held the view __________the book said was right.A. that whatB. what thatC. thatD. whether17. I think that this meal was well worth ________ was charged for it.A. thatB. whatC. whichD. how many18. Do you think the reason ________ he gave is believable?A. for whichB. whichC. whyD. what19. Although he knew little about the large amount of work done in the field, he succeeded ________ other more well-informed experimenters failed.A. whichB. thatC. whatD. where20. Although Anne is happy with her success she wonders________ will happen to herprivate life. A. it B. that C. what D. this21. The news has spread all over the country _____ the spaceship succeeded in returning to the earth. A. that B. which C. whether D. what22. You can choose ________ book you like among these.A. no matter whatB. whateverC. whoseD. whichever23. Is this research center ________ we visited the modern equipment last year?A. whereB. thatC. the oneD. which24. Loulan city is not at all ___a traveler who has never seen the desert before can expect.A. whatB. that C .which D. where25. What the doctor is uncertain about is ____ my mother will recover from the seriousdisease soon. A. when B. how C. whether D. why26. We should buy our daughter a computer in ______ it can help to improve her English.A. whichB. thatC. whatD. whom27. I wish to have a friend with ______ shares my hobbies and interests.A. whomeverB. no matter whoC. whoeverD. anyone28. W hy don’t you bring _______ to his attention that you are too busy to do it.A. thisB. whatC. thatD. it29. The task required _______ did it ______ careful and brave enough.A. who; isB. whom; wasC. whomever; wereD. whoever; be30. We wrote a letter of thanks to _______ had helped us.A. whoB. thoseC. whomD. whoever31.--- What are you anxious about? --- ___________.A. Whether we can succeedB. If we succeedC. Do you succeedD. That we can succeed32. I just don’t understand_______ that prevents so many Americans from being as happy as one might expect. A .why it does B. what it does C. what it is D. why it is 33. ---I rang you at about ten, but there was no reply.---Oh, that was probably _________ I was seeing the doctor.A. whenB. whyC. whatD. that34. I kept this picture ____ I can see it every day as it reminds me of my university days.A. in whichB. whereC. whenD. whether35. ---I can’t find Mr. Smith .Where did you last see him this morning?---It was in the hotel _______ he stayed.A. thatB. whereC. whichD. since36. You should keep those old jam bottles ----you never know ____ you might need them.A. whenB. how.C. what D .where37. ---Do you have anything in mind ______you’d like for supper ?---Well, ______will do for me.A. which, everythingB. that, anythingC. what, whateverD. that, either38. After five hours’ drive, they reached _____ they thought was the place they’d beendreaming of . A. that B. what C. which D. where39. It is recommended that the project ___ until all the preparations have been made.A. is not startedB. not be startedC. will not be startedD. is not to be started40._______ has finished the work ahead of time will be rewarded though we don't know who it will be. A. Those who B. Anyone C. Whoever D. No matter who41. ______ makes the school famous is ______ more than 90% of the students have been admitted to universities.A. What; becauseB. That; becauseC. That; whatD. What; that42. Everything depends on _____ they will support you about it.A. ifB. whichC. whetherD. that43. After ten years, she changed a lot and looked different from___ she used to be.A. thatB. whomC. whatD. who44. I know nothing about the young lady--- ______ she is from Being.A. exceptB. except forC. except thatD. besides45. The question came up at the meeting _____we had enough money for our research.A. thatB. whatC. whichD. whether46. __________ a terrible storm would take place in Hainan.A. Word came whichB. Word came thatC. Word that cameD. Words came that47. _________ D avid says sounds right to Helen. That’s why she has made up her mind not to leave him________ happens.A. whatever; whateverB. No matter what; whateverC. No matter what; no matter whatD. Whatever; however48. Mr. Hopkins has not yet answered my question________ I can go with him to _______he calls the Underground Treasure House next week.A. that; whichB. that; whereC. whether; thatD. whether; what49. --- Don’t you believe me?--- ________, I will believe _________ you say.A. No; whateverB. Yes; no matter whatC. No; no matter whatD. Yes; whatever50. __________ is mentioned above, the number of the students in senior high school is increasing. A. Which B. As C. That D. It51. See the flags on top of the building? That was ______ we did this morning.A. whenB. whichC. whereD. what52. “What did your parents think about your decision?”“They always let me do ______ I think I should.” A. when B. that C. how D. what53. “Could you do me a favor?”“It depends on ____ it is.”A. whichB. whicheverC. whatD. whatever54. There is much chance ____ Bill will recover from his injury in time for the race.A. thatB. whichC. untilD. if55. ______ makes this shop different is that it offers more personal services.A. WhatB. WhoC. WhateverD. Whoever56. Mary wrote an article on _______ the team had failed to win the game.A. whyB. whatC. whoD. that57. The poor young man is ready to accept _______ help he can get.A. whicheverB. howeverC. whateverD. whenever58. As soon as he comes back, I’ll tell him when ______and see him.A. you will comeB. will you comeC. you comeD. do you come59. ______ in the regulations that you should not tell other people the password of your e-mail account.A. What is requiredB. What requiresC. It is requiredD. It requires60. Elephants have their own way to tell the shape of an object and ___ it is rough or smooth. A. 不填 B. whether C. how D. what61. The way he did it was different _______ we were used to.A. in whichB. in whatC. from whatD. from which62. Great changes have taken place in that school. It is no longer ____ it was 20 years ago,______ it was so poorly equipped.A. what; whenB. that; whichC. what; whichD. which; that63. Danby left word with my secretary ________ he would call again in the afternoon.A. whoB. thatC. asD. which64. “Don’t you think it necessary that he _______ to Miami but to New York?”“I agree, but the problem is ________ he has refused to.”A. will not be sent; thatB. not be sent; thatC. should not be sent; whatD. should not send; what65. Some researchers believe that there is no doubt _____ a care for AIDS will be found.A. whichB. thatC. whatD. whether66. The old lady’s hand shook frequently. She explained to her doctor ________ thisshaking had begun half a year before, and ______, only because of this, she had been forced to give up her job.A. when; howB. how; whenC. how; howD. why; why67. Do you have any idea _______ is actually gong on in the classroom?A. thatB. whatC. asD. which68. I want to know ________ the thief was caught on the spot.A. whichB. thatC. whatD. whether69. Our club is open to adults only. ______ your children have entered without permission.A. There seems thatB. It seems to beC. There seems to beD. It seems that70. You are saying that everyone should be equal, and this is ________ I disagree.A. whyB. whereC. whatD. how71. The road is covered with snow. I can’t understand _______ they insist on going bymotorbike. A. why B. whether C. when D. how72. We cannot figure out _______ quite a number of insects, birds, and animals are dying out. A. that B. as C. why D. when73. The Foreign Minister said, “_______ our hope that the two sides will work towards peace.” A. This is B. There is C. That is D. It is74. A story goes _______ Elizabeth 1 of England liked nothing more than being surrounded by clever and qualified noblemen at court.A. whenB. whereC. whatD. that75. I have always been honest and straightforwar d, and it doesn’t matter ____ I’m talking to. A. who is it B. who it is C. it is who D. it is whom76. The other day, my brother drove his car down the street at ________ I thought was a dangerous speed. A. as B. which C. what D. that77. After Yang Liwei succeeded in circling the earth, ______ our astronauts desire to do is walk in space. A. where B. what C. that D. how78. Along with the letter was his promise _______ he would visit me this coming Christmas. A. which B. that C. what D. whether79. A modern city has been set up in ________ was a wasteland ten years ago.A. whatB. whichC. thatD. where80. I thin k father would like to know ________ I’ve been up to so far, so I decide to send him a quick note. A. which B. why C. what D. how81. Parents are taught to understand ________ important education is to their children’s future. A. that B. how C. such D. so82.It is pretty well understood _________ controls the flow of carbon dioxide in and out the atmosphere today. A. that B. when C. what D. how83. ---Are you still thinking about yesterday’s game?---Oh, that’s _________.A. what makes me feel excitedB. whatever I feel excited aboutC. how I feel about itD. when I feel excited84. There is a new problem involved in the popularity of private cars _________ roadconditions need ________.A. that; to be improvedB. which; to be improvedC. where; improvingD. when; improving85. _________ made the school proud was __________ more than 90% of the studentshad been admitted to key universities.A. What; becauseB. What; thatC. That; whatD. That; because86. There’s a feeling in me _______ we’ll never know what a UFO is –not ever.A. thatB. whichC. of whichD. what87. Perseverance is a kind of quality—and that’s ____ it takes to do anything well.A. whatB. thatC. whichD. why88. ---I think it’s going to be a big problem.---Yes, it could be.---I wonder _________ we can do about it.A. ifB. howC. whatD. that89. __________ fashion differs from country to country may reflect the cultural differences from one aspect.A. WhatB. ThatC. ThisD. Which90. When you answer questions in a job interview, please remember the golden rule:Always give the monkey exactly __________ he wants.A. whatB. whichC. whenD. that91. A computer can only do __________ you have instructed it to do.A. howB. afterC. whatD. when92. Information has been put forward __________ more middle school graduates will be admitted into universities.A. while B that C. when D. as93. I read about it in some book or other. Does it matter ___________ it was?A. where B what C how D. which94. Little Tommy was reluctant to tell the schoolmaster____ he had done the day before.A. that B how C. where D .what95._________ she couldn’t understand was __________ fewer and fewer students showed interest in her lessons.A. What; whyB. That; whatC. What; becauseD. Why; that96. Someone is ringing the doorbell. Go and see _________.A. who is heB. who he isC. who is itD. who it is97. These wild flowers are so special I would do __________ I can to save them.A. whateverB. thatC. whichD. whichever98. It was a matter of __________ would take the position.A. whoB. whoeverC. whomD. whomever99. _________ we’ll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where100. It worried her a bit _________her hair was turning grey.A. whileB. thatC. ifD. for名词性从句练习100题---答案1.DCDCB;10. DDBCA；11 . CCCAA; 20.ABBDC 25. ADAAC;30. BCDDD31. ACABB; 40. ABBBC;41. DCCCD; 50 . BADDB;51. DDCAA; 60. ACACB; 61. CABBB; 70. CBDDB；71. ACDDB;80. CBBAC; 81. BCAAB; 90. AACBA; 91 .CBDDA; 100. DAABB。
复习专题 名词性从句单元测试题(含答案)(1)
复习专题名词性从句单元测试题(含答案)(1)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．________ 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。
3．Located between the 16th and the 18th floor, ______ I call my “home” is more like a “bird's nest”.A. whichB. thatC. whatD. where【答案】 C【解析】【分析】考查主语从句。
What引导主语从句______ I call my “home”且 What在从句中充当call的宾语。
名词性从句测试题及答案经典1
名词性从句测试题及答案经典1一、名词性从句1．_____Macao has achieved shows _____"one country, two systems" principle is the best solution to the Macao and Hongkong question, left by history.A. That; whatB. What; thatC. What; whatD. That; that【答案】 B【解析】【分析】句意：澳门取得的成就表明，“一国两制”原则是解决历史遗留下来的澳门和香港问题的最好办法。
分析句子可知，_____Macao has achieved为主语从句，从句中achieve缺少宾语，所以第一个空用what来充当宾语。
再分析句子可知，shows后接宾语从句，从句句意和结构完成，所以第二个空应填连接词that。
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that引导的宾语从句。
2．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。
第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。
【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。
3．________ 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。
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名词性从句测试题及答案1一、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．___ 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。
【点评】考查名词性从句，本题涉及what引导的主语从句。
4．It________that the road will be closed tomorrow for repairs.A. was announcedB. has been announcedC. had been announcedD. would be announced【答案】 B【解析】【分析】本题考查动词的时态和语态。
题干句子中that到句子结束是宾语从句，且从句动词用“will＋动词原形”表示将来，由此推断出空白处谓语动词应用现在的某种时态，在所给四个选项中，只有B项正确。
【点评】考查现在完成时的被动语态，其结构是have/has +been +done。
需要注意宾语从句的时态。
主句用现在时，从句所需的任何时态。
5．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.6．Located between the 16th and the 18th floor, ______ I call my “home” is more like a “bird's nest”.A. whichB. thatC. whatD. where【答案】 C【解析】【分析】考查主语从句。
What引导主语从句______ I call my “home”且 What在从句中充当call的宾语。
故选C。
7．______ 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。
8．______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.A. WhichB. WhatC. ItD. As【答案】 C【解析】【分析】句意：医疗保健的进步将促进一个更强大、更繁荣的经济，这是我们的信念。
that引导的是主语从句，故空格处应该用it作形式主语，代替真正的that引导的主语从句。
故答案选C。
【点评】考查it的用法，以及主语从句的应用。
9．They lost their way in the forest, and ________ made matters worse was that night began to fall.A. thatB. itC. whatD. which【答案】 C【解析】【分析】句意：他们在森林里迷路了，更糟糕的是天开始黑了。
根据连词and可知，本句需要一个引导主语从句的连接词，该词同时还要能在从句里充当主语。
that不能在句中作成分；it不能引导主语从句；which意为“哪一个”，不符合本句语境。
排除A、B、D三项。
故选C。
【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．________ has been proved is that animals and insects have their own languages.A. WhatB. AsC. ItD. That【答案】 A【解析】【分析】句意：已被证明的是动物和昆虫有自己的语言。
根据is判断，此处为主语从句，分析该从句，缺少主语，用what。
选A。
【点评】考查名词性从句，本题涉及what引导的主语从句的应用。
11．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。
12．________ his failure lies is expected ________ clear to us.A. What… to makeB. How… madeC. Where… to be madeD. 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.13．________ is the centre of our planetary system was a difficult concept to grasp in the Middle Ages.A. It's the sun and not the earthB. The sun and not the earthC. Being the sun and not the earthD. That the sun and not the earth【答案】 D【解析】【分析】句意：太阳而不是地球是我们行星系统的中心，这在中世纪是一个很难理解的概念。