1主语从句练习及答案
主语从句练习题及答案
主语从句练习题及答案A. The estimateB. The estimateC. They are estimatedD. It is estimated that2. _____ was once regarded as impossible has now become a reality.A. ThatB. WhichC. WhoD. What3. _____ we have achieved is attributed to the guidance of our parents.A. WhoeverB. WhateverC. HoweverD. That4. _____ you say now can’t make up for what you’ve done.A. No matterB. WhateverC. HoweverD. That5. Although _____ happened in this developed country sounds like science fiction, itcould occur elsewhere in the world.A. whichB. whatC. howD. it6. _____ she had forgotten to take her notebook.A. That occurred to herB. She occurred thatC. To her that occurredD. It occurred to her that7. I am sure that _____ she said is wrong.A. whichB. allC. thisD. what8. We lost our way in the forest, and _____ made matters worse was that it wasgetting dark.A. thatB. whichC. itD. what9. _____ occurred to him that he had forgotten to lock the door when he left home.A. ThisB. ItC. ThatD. These10. _____ or not is still uncertain.A. He’s comingB. If he is comingC. That comingD. Whether he’s coming11. It’s _____ he’ll be able to come.A. doubt whetherB. doubtfulC. doubt itD. doubtful whether12. It is _____ that the bridge has existed for more than three centuries .A. appearedB. risenC. saidD. born13. _____ he saw both surprised and frightened him.A. ThatB. WhenC. WhatD. Which14. _____ is a spell of warm sunshine.A. What do we all need.B. What all we needC. What we needD. What we all need15. _____ is a pity that he should feel so upset.A. WhatB. ThatC. HeD. It16. _____ a spoonful of soil can tell us so much about the structure and early history of the moon.A. RemarkableB. Quite remarkablyC. It is remarkable thatD. It is remarkable17. _____ you nominate will be elected.A. WhoB. WhichC. WhomeverD. That’s18. _____ book you borrow must be returned withina week.A. WhatB. WhichC. WhicheverD. That’s19. _____ is troubling me is that I don’t have much experience ininternational commerce.A. ItB. ThatC. WhichD. What20. _____they wil go there to try another experiment has not been decided yet.A. WhetherB. IfC. About whetherD. Why根据提示，完成句子。
高中英语主语从句练习题20题含答案解析
高中英语主语从句练习题20题含答案解析1._____ he will come or not is still a question.A.ThatB.WhetherC.WhoD.What答案解析：B。
“Whether...or not”是固定搭配，表示“是否”。
A 选项that 在主语从句中不表示“是否”的意思；C 选项who 表示“谁”，不符合语境；D 选项what 表示“什么”，也不符合题意。
2._____ surprised us most was his attitude.A.ThatB.WhetherC.WhoD.What答案解析：D。
what 在主语从句中充当主语，表示“什么”。
A 选项that 在主语从句中无实际意义，只起连接作用；B 选项whether 表示“是否”；C 选项who 表示“谁”，在这里都不符合语境。
3._____ is known to us all is that the earth is round.A.ThatB.WhetherC.WhoD.What答案解析：A。
“That is known to us all”是固定句式，that 在主语从句中无实际意义，只起连接作用。
B 选项whether 表示“是否”；C 选项who 表示“谁”；D 选项what 表示“什么”，在这里都不合适。
4._____ he has done is very important.A.ThatB.WhetherC.WhoD.What答案解析：D。
what 在主语从句中充当宾语，表示“他所做的事情”。
A 选项that 在主语从句中无实际意义，只起连接作用；B 选项whether 表示“是否”；C 选项who 表示“谁”，在这里都不符合语境。
5._____ will win the game is not clear.A.ThatB.WhetherC.WhoD.What答案解析：C。
根据语境，“谁会赢得比赛还不清楚”，who 在主语从句中充当主语，表示“谁”。
九年级英语主语从句练习题50题含答案解析
九年级英语主语从句练习题50题含答案解析1._____ he will come or not is still a question.A.IfB.WhetherC.ThatD.What答案解析：B。
“whether...or not”是固定搭配，表示“是否”。
A 选项“if”不能与“or not”连用；C 选项“that”在主语从句中无实际意义，且不符合语境；D 选项“what”在主语从句中要充当成分，不符合题意。
2._____ surprised me most was that he passed the exam.A.WhatB.ThatC.WhichD.It答案解析：A。
“what surprised me most”中“what”在主语从句中充当主语，表示“最让我惊讶的事情”。
B 选项“that”在主语从句中无实际意义，且不符合语境；C 选项“which”在主语从句中有选择的意思，不符合题意；D 选项“it”不是引导词。
3._____ we need is more time.A.ThatB.WhatC.WhichD.When答案解析：B。
“what we need”中“what”在主语从句中充当宾语，表示“我们需要的东西”。
A 选项“that”在主语从句中无实际意义，且不符合语境；C 选项“which”在主语从句中有选择的意思，不符合题意；D 选项“when”在主语从句中表示时间，不符合题意。
4._____ is known to us all, the earth is round.A.AsB.WhatC.ThatD.Which答案解析：A。
“As is known to us all”是固定用法，意思是“众所周知”。
B 选项“what”在主语从句中要充当成分，不符合题意；C 选项“that”在主语从句中无实际意义，且不符合语境；D 选项“which”在主语从句中有选择的意思，不符合题意。
九年级英语主语从句练习题50题
九年级英语主语从句练习题50题1._____ is important for us to study hard.A.ThatB.ThisC.ItD.One答案解析：C。
“It is important for sb to do sth”是固定句型，it 作形式主语，真正的主语是后面的不定式短语“to study hard”。
A 选项“That”引导主语从句时，不能用在这个句型中；B 选项“This”不能作形式主语；D 选项“One”也不能作形式主语。
2._____ is necessary to protect the environment.A.WhatB.ThatC.ItD.One答案解析：C。
“It is necessary to do sth”是固定句型，it 作形式主语，真正的主语是后面的不定式短语“to protect the environment”。
A 选项“What”引导主语从句时，不能用在这个句型中；B 选项“That”引导主语从句时，不能用在这个句型中；D 选项“One”不能作形式主语。
3._____ is known to all that the earth is round.A.ThatB.ThisC.ItD.One答案解析：C。
“It is known to all that...”是固定句型，it 作形式主语，真正的主语是后面的主语从句“that the earth is round”。
A 选项“That”引导主语从句时，不能用在这个句型中；B 选项“This”不能作形式主语；D 选项“One”不能作形式主语。
4._____ is a pity that he missed the concert.A.ThatB.ThisC.ItD.One答案解析：C。
“It is a pity that...”是固定句型，it 作形式主语，真正的主语是后面的主语从句“that he missed the concert”。
高三英语主语从句试题答案及解析
高三英语主语从句试题答案及解析1. A heated debate was set off by his proposal at the meeting yesterday over _______it is practical in our area.A．what B．whenC．whether D．that【答案】C【解析】考查名词性从句。
本题考查同位语从句，从句为一般疑问句，故用关系词whether。
句意：在昨天会议上，他提出的建议在我们的地区是否实用引发一场热烈的辩论。
故C正确。
【考点】考查名词性从句2. (2014·长沙名校模考)________he referred to in his article was often discussed by many people in the past.A．That B．WhatC．Whether D．Where【答案】B【解析】考查名词性从句。
此句中referred to后缺少宾语，因此应用what引导该主语从句。
答案：B3. It remains unknown ________ the peace talk between the two countries is going to lead. A．where B．whenC．how D．why【答案】A【解析】A 考察名词性从句。
本句中的it是形式主语，真正的主语是空格以及后面的句子。
从句主语谓语完整，由从句中的lead导致，通向，为不及物动词，后面缺少地点状语，使用where 引导名词性从句。
故A正确。
4. ________ we go there by train or by ship makes no difference. The time and the fees are the same.A．Which B．HowC．Whether D．Why【答案】C【解析】C 考察连词，whether..or…不管…还是…；在本句中做主语从句的引导词。
主语从句练习50题
主语从句练习50题1. ______ makes me happy is reading books.A. WhatB. ThatC. WhetherD. How答案：A。
本题考查主语从句的引导词。
“What”在从句中充当主语，表示“什么”；“That”在主语从句中不充当成分，且没有实际意义，放在此处句子意思不完整；“Whether”表示“是否”，不符合句子意思；“How”表示“如何”，也不符合句子意思。
所以选择A 选项。
2. ______ he will come or not is still unknown.A. WhatB. ThatC. WhetherD. How答案：C。
“Whether...or not”是固定搭配，表示“是否”；“What”“That”“How”都不能与“or not”这样搭配，所以选择C 选项。
3. It is not clear ______ he did it.A. whatB. thatC. whetherD. how答案：C。
句子意思是“不清楚他是否做了这件事”，“Whether”表示“是否”，符合句子语境；“What”在从句中充当成分，此处不缺成分；“That”在主语从句中不充当成分，且没有实际意义，放在此处句子不通顺；“How”表示“如何”，不符合句子意思。
因此选择C 选项。
4. ______ is important for us to learn English well.A. WhatB. ThatC. WhetherD. How答案：B。
“That”引导的主语从句，“That”在从句中不充当成分，且没有实际意义，此处只是单纯陈述“学好英语对我们很重要”这个事实；“What”“Whether”“How”在句子中意思不符合，所以选择B 选项。
5. ______ we need is more time.A. WhatB. ThatC. WhetherD. How答案：A。
主语从句60题(最新整理)
1.______Li Bai,a great Chinese poet,was born is known to the public,but some won’t accept it.A.ThatB.WhyC.WhereD.How[答案] 1.C[解析] 1.句意:李白,中国伟大的诗人,出生在什么地方人人皆知,但是有些人对此并不接受。
本题考查主语从句。
“______Li Bai,a great Chinese poet,was born”为主语从句,该从句缺少状语,结合选项可知答案应为C。
2.If you swim in a river or lake,be sure to investigate______is below the water surface.Often there are rocks or branches hidden in the water.A.whatB.whoC.thatD.whoever[答案] 2.A[解析] 2.句意:如果你在河里或湖里游泳,一定要查明水下的状况。
经常会有岩石或树枝隐藏在水中。
本题考查名词性从句。
动词investigate后的宾语从句中缺少主语,同时主语为物,故排除B、C、D三项。
根据句意可知选A。
3.______we understand things has a lot to do with what we feel.A.WhereB.HowC.WhyD.When[答案] 3.B[解析] 3.句意:我们怎样理解事物与我们的认知有很大关系。
本题考查名词性从句。
A项在从句中作地点状语;B项在从句中作方式状语,意为“如何”;C项意为“为什么”;D项意为“什么时候”。
故选B项。
4.I truly believe______beauty comes from within.A.thatB.whereC.whatD.why[答案] 4.A[解析] 4.句意:我确信美丽源自内心。
主语从句练习题及答案
主语从句练习题及答案一、主语从句练习题1. ______ is not known is whether the meeting will be held tomorrow.A. IfB. WhatC. ThatD. Which2. ______ she said surprised me a lot.A. WhatB. WhetherC. ThatD. Which3. ______ is certain is that he will stay in Paris for a year.A. WhatB. WhetherC. ThatD. Which4. ______ studying abroad is expensive, many students still choose to do so.A. WhatB. IfC. ThatD. Which5. ______ made her angry was his rude behavior.A. WhatB. WhetherC. ThatD. Which二、主语从句练习题答案1. B. What2. A. What3. C. That4. A. What5. C. That三、文章练习题主语从句是句子中的一个句子成分，用来作为句子的主语，它常常以连接代词或连接副词的形式出现。
在句子中，主语从句常常起到引导词，引导句子的作用。
以下是几个关于主语从句的练习题。
练习题1：______ is not known is whether the meeting will be held tomorrow.练习题2：______ she said surprised me a lot.练习题3：______ is certain is that he will stay in Paris for a year.练习题4：______ studying abroad is expensive, many students still choose to do so.练习题5：______ made her angry was his rude behavior.答案：1. B. What2. A. What3. C. That4. A. What5. C. That通过以上练习题，我们可以锻炼和巩固对主语从句的理解和应用能力。
高一英语主语从句的用法练习题40题
高一英语主语从句的用法练习题40题1._____ is important to learn English well.A.ThatB.ThisC.ItD.One答案：C。
it 作形式主语，真正的主语是to learn English well。
在英语中，为了避免句子头重脚轻，常用it 作形式主语，而把真正的主语放在后面。
A 选项that 不能作形式主语；B 选项this 也不能作形式主语；D 选项one 不符合语法规则。
2._____ is known to all that the earth is round.A.ThatB.ThisC.ItD.One答案：C。
it 作形式主语，真正的主语是that the earth is round。
“It is known to all that...”是固定句型，表示“众所周知……”。
A 选项that 不能直接放在句首作形式主语；B 选项this 不能作形式主语；D 选项one 不符合语法规则。
3._____ is a pity that you can't come.A.ThatB.ThisC.ItD.One答案：C。
it 作形式主语，真正的主语是that you can't come。
“It is a pity that...”是固定句型，表示“很遗憾……”。
A 选项that 不能作形式主语；B 选项this 不能作形式主语；D 选项one 不符合语法规则。
4._____ seems that he is very angry.A.ThatB.ThisC.ItD.One答案：C。
it 作形式主语，真正的主语是that he is very angry。
“It seems that...”是固定句型，表示“似乎……”。
A 选项that 不能作形式主语；B 选项this 不能作形式主语；D 选项one 不符合语法规则。
5._____ is necessary to study hard.A.ThatB.ThisC.ItD.One答案：C。
高考语法 名词性从句之主语从句与表语从句 讲解及练习(附答案)
名词性从句1 主语从句：在复合句中充当主语成分的句⼦子叫主语从句 1.1 主语从句的引导词 1.2 主语从句的形式Conlusion 1:主语从句作主语时，谓语动词一般用单数（第三人称）形式。
Conlusion 2:连词That在句中无实际意义，不能省略。
Conlusion 3:whether引导的主语从句可放在句首，但if不能。
Conlusion 4:主语从句中连词that/whether等不能重复使用。
Conlusion 5:what引导的主语从句，可根据表语决定主句的单复数形式。
Conlusion 6:为了平衡句子结构，主语从句大多可改写为it形式主语形式。
从属连词连接副词连接代词引导词that,whether,if when, why, where, how, whenever, wherever, however what, who, whom, which, whatever,whoever, whomever, whichever形式说明⽰示例that 引导的主语从句置于句⾸首、that 在主语从句中不做任何成分、不可省略他要来看望我们，这使我们很⾼高兴。
形式评语it代替主语从句It + is/was + adj. +从句对于学⽣生来说很明显的是，他们要为未来做好准备。
“It is/was + necessary/important/surprising/strange/unbelievable/obvious…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 名词 +从句我们的希望是，我们都能通过考试。
It + is/was + V-ed +从句据宣布，该计划已经顺利通过。
“It is/was + suggested/advised/ordered/insisted/required/demanded…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 特殊动词 +从句(happen,occur,seem,appear…)你似乎不同意这个计划。
高一英语主语从句试题
高一英语主语从句试题1. ____ shocks the audience in the film Back to 1942 is the great suffering the famine（饥荒）brought to Henan people.A．Which B．What C．Who D．That【答案】B【解析】考查主语从句：句意：在电影《1942》里面给观众很大震惊的是饥荒给河南人带来的巨大的痛苦。
在主语从句中缺少主语用what连接主语从句，which哪一个，who谁，不符合句意，that连接主语从句的时候，that不做成分，只起到连接的作用。
选B。
【考点】考查主语从句点评：主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
解答这类题目，关键在于分析清楚句子结构。
通过判断引导词在从句中所作的成分及意义，来选择正确的引导词。
连接主语从句的从属连词主要有that, if, whether，和疑问词（what how where when ...)。
that引导表示陈述句的主语从句，if和whether，whether...or not引导表示“是否”，引导一般疑问句。
连接代词主要有who, whom, whose, what,whoever, whomever, whosever, whatever, whichever等。
连接代词一般指疑问，但what, whatever除了指疑问外，也可以指陈述。
2. ___________ David showed the report to the public surprised me.A What B. That C. Which D. Who【答案】B【解析】考查主语从句：句意：大卫将报告给大家看让我很惊讶。
Surprise、前面的句子是主语从句，因为主语从句的意思完整，用that连接，that不做成分，但是不能省略。
高三英语主语从句试题答案及解析
高三英语主语从句试题答案及解析1. ______ he misunderstood my position on the question is obvious from his remarks.A．What B．HowC．That D．Which【答案】C【解析】句意：他误解了我在这个问题上的立场从他的言论中显而易见。
A. What在名词性从句中做主语或宾语、表语；B. How在从句中做状语；C. That在从句中只起连接作用，不做成分；D. Which在名词性从句中表哪一个。
he misunderstood my position on the question不缺主语和宾语，结合句意也不需要状语和which的含义，所以排除其他选C。
【考点】考查主语从句的疑问词。
2. It is by no means clear the president can do to end the strike.A．how B．whichC．that D．what【答案】D【解析】此处it是形式主语，what引导的是主语从句，作真正的主语。
What作do的宾语。
句意：总统采取什么行动结束这次罢工一点也不清楚。
3.（2014山东省实验中学高三第二次模拟考试）7．Perhaps it will never be known __________ he did with those materials on the incident．A．that B．what C．which D．how【答案】B【解析】本句中的it是形式主语，真正的主语是后面的主语从句what he did with those materials on the incident。
在这个主语从句中，what既是引导词也是动词did的宾语。
固定搭配do with和what连用；deal with和how连用。
句义：也许他如何处理事故中的这些材料永远都不会为人所知。
主语从句重点练习50题
主语从句重点练习50题1. _____ is important for us to learn English well.A. ThatB. ItC. ThisD. What答案：B。
本题考查it 作形式主语的主语从句。
It 在句中作形式主语，真正的主语是后面的动词不定式短语“to learn English well”。
A 选项“that”引导主语从句时，在句中不充当任何成分；C 选项“this”一般不引导主语从句；D 选项“what”在主语从句中充当成分，而本句不缺成分。
2. _____ makes mistakes must correct them.A. WhoB. AnyoneC. WhoeverD. Anybody答案：C。
“whoever”引导主语从句，表示“无论谁”。
A 选项“who”表示“谁”，没有“无论谁”的意思；B 选项“anyone”不是引导词；D 选项“anybody”也不是引导词。
3. _____ he will come or not is unknown.A. WhetherB. IfC. ThatD. What答案：A。
whether 引导主语从句，表示“是否”，且whether...or not 是固定搭配。
B 选项“if”也表示“是否”，但不能与or not 连用；C 选项“that”在主语从句中不表示“是否”；D 选项“what”在句中充当成分，本句不缺成分。
4. _____ we need is more time.A. ThatB. WhatC. WhetherD. If答案：B。
本题考查what 引导的主语从句。
what 在从句中充当need 的宾语。
A 选项“that”在从句中不充当成分；C 选项“whether”表示“是否”；D 选项“if”也表示“是否”。
5. _____ she did is not known.A. WhatB. HowC. ThatD. Where答案：A。
高考英语专项复习：主语从句讲解及练习(附答案)
主语从句讲解及练习主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。
二.主语从句主要有三类：（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。
That you are so indifferent bothers me.你如此冷淡使我很烦恼。
That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。
（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。
（3）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。
What I want to know is this. 我想知道的就是这事。
Whatever we do is to serve the people.我们无论做什么都是为人民服务。
（4）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。
)eg:Where we should leave it is a problem.When they will come hasn’t been made pubic.他们什么时候来还不知道。
高中英语主语从句用法练习题40题含答案解析
高中英语主语从句用法练习题40题含答案解析1._____ he will come to the party is still uncertain.A.ThatB.WhetherC.WhatD.Who答案解析：B。
“Whether he will come to the party”是主语从句，在这个句子中“whether”表示“是否”，整个主语从句的意思是“他是否会来参加聚会”。
“that”引导主语从句时在从句中不充当任何成分，只起连接作用，且没有实际意义，此句中意思不符。
“what”在主语从句中要充当成分，此句不缺成分。
“who”在主语从句中表示“谁”，此句不是问谁会来参加聚会。
2._____ she won the first prize surprised all of us.A.ThatB.WhetherC.WhatD.When答案解析：A。
“That she won the first prize”是主语从句，“that”在从句中不充当任何成分，只起连接作用，此句中“她赢得一等奖这件事让我们所有人都很惊讶”，用“that”符合语法规则。
“whether”表示“是否”，不符合句意。
“what”在主语从句中要充当成分，此句不缺成分。
“when”表示“什么时候”，不符合句意。
3._____ is important is that we should study hard.A.ThatB.WhetherC.WhatD.Who答案解析：C。
“What is important”是主语从句，“what”在从句中充当主语，表示“重要的事情”。
“that”在主语从句中不充当成分，此句缺主语。
“whether”表示“是否”，不符合句意。
“who”表示“谁”，不符合句意。
4._____ he said at the meeting was very important.A.ThatB.WhetherC.WhatD.Who答案解析：C。
主语从句超全练习题及答案
主语从句超全练习题及答案主语从句练题I.用适当的词填空，使句子意思完整。
1.Why XXX.2.The Foreign Minister said,“It is our hope that the two sides will work towards peace.”3.Which team will win the match is still unknown.4.XXX to the party will receive a present.5.Whether Mary has left is still a n.6.It’XXX.7.XXX us.8.We usually think what we can’t get seems better than what we have.9.It is a fact that English is being accepted as an nal language.10.Who is to be sent there to solve the problem hasn’t been decided.II.下列各句中均有一处错误，请改正。
1.What the old man’s son wanted to know was where the gold had been hidden.2.It XXX.3.XXX his task on time is of great importance.4.Whether the 2008 Olympic Games will be held in Beijing XXX(改为：That the 2008 Olympic Games will be held in Beijing XXX.)5.XXX。
XXX is to walk in space.6.The last person leaving the room should turn off the lights.7.The reason why they will solve the us problem today has not been decided yet.8.It is still XXX.9.It is currently unknown whether our spring sports meet will be held this week or not.10.It'XXX.主语从句研究指导：1.That the earth travels round the sun is a well-known fact.2.It is uncertain whether the artist can do it or not.3.Who will play the lead in the play has not been decided yet.4.Where the young man has gone is not known.5.When and where the test will be given is not yet decided.常见错误展示：1.It is common knowledge that light travels XXX.2.XXX.3.What the professor said is of great importance.4.Where the trees will be planted has not been decided。
中考英语主语从句练习题50题
中考英语主语从句练习题50题1._____ he will come or not is still a question.A.ThatB.WhetherC.WhatD.When答案：B。
本题考查主语从句的引导词。
“Whether...or not”是固定搭配，表示“是否”，在主语从句中只能用whether 引导。
A 选项that 在主语从句中无实际意义，只起连接作用，不符合题意；C 选项what 表示“什么”，不符合语境；D 选项when 表示“什么时候”，也不符合题意。
2._____ she is coming to the party makes us very happy.A.ThatB.WhetherC.WhatD.When答案：A。
本题考查主语从句的引导词。
that 引导主语从句时，在从句中不充当任何成分，只起连接作用，且无实际意义。
本句中“she is coming to the party”是完整的句子，所以用that 引导。
B 选项whether 表示“是否”，不符合题意；C 选项what 表示“什么”，在从句中要充当成分，本句不缺成分，所以不合适；D 选项when 表示“什么时候”，不符合语境。
3._____ we need is more time.A.ThatB.WhetherC.WhatD.When答案：C。
本题考查主语从句的引导词。
what 在主语从句中充当宾语，“we need”缺少宾语，所以用what 引导。
A 选项that 无实际意义，不充当成分，不符合；B 选项whether 表示“是否”，不符合题意；D 选项when 表示“什么时候”，也不符合语境。
4._____ he can finish the work on time is important.A.ThatB.WhetherC.WhatD.When答案：B。
本题考查主语从句的引导词。
“whether...is important”表示“是否……是重要的”，符合语境。
(完整版)1主语从句练习及答案
主语从句练习1. _____ as much as one-fifth of all timber harvested is not used.A. The estimateB. The estimateC. They are estimatedD. It is estimated that2. _____ was once regarded as impossible has now become a reality.A. ThatB. WhichC. WhoD. What3. _____ we have achieved is attributed to the guidance of our parents.A. WhoeverB. WhateverC. HoweverD. That4. _____ you say now can’t make up for what you’ve done.A. No matterB. WhateverC. HoweverD. That5. Although _____ happened in this developed country sounds like science fiction, itcould occur elsewhere in the world.A. whichB. whatC. howD. it6. _____ she had forgotten to take her notebook.A. That occurred to herB. She occurred thatC. To her that occurredD. It occurred to her that7. I am sure that _____ she said is wrong.A. whichB. allC. thisD. what8. We lost our way in the forest, and _____ made matters worse was that it wasgetting dark.A. thatB. whichC. itD. what9. _____ occurred to him that he had forgotten to lock the door when he left home.A. ThisB. ItC. ThatD. These10. _____ or not is still uncertain.A. He’s comingB. If he is comingC. That comingD. Whether he’s coming11. It’s _____ he’ll be able to come.A. doubt whetherB. doubtfulC. doubt itD. doubtful whether12. It is _____ that the bridge has existed for more than three centuries .A. appearedB. risenC. saidD. born13. _____ he saw both surprised and frightened him.A. ThatB. WhenC. WhatD. Which14. _____ is a spell of warm sunshine.A. What do we all need.B. What all we needC. What we needD. What we all need15. _____ is a pity that he should feel so upset.A. WhatB. ThatC. HeD. It16. _____ a spoonful of soil can tell us so much about the structure and early history of the moon.A. RemarkableB. Quite remarkablyC. It is remarkable thatD. It is remarkable17. _____ you nominate will be elected.A. WhoB. WhichC. WhomeverD. That’s18. _____ book you borrow must be returned within a week.A. WhatB. WhichC. WhicheverD. That’s19. _____ is troubling me is that I don’t have much experience in international commerce.A. ItB. ThatC. WhichD. What20. _____they wil go there to try another experiment has not been decided yet.A. WhetherB. IfC. About whetherD. Why根据提示，完成句子。
高中英语主语从句专项练习含答案
高中英语主语从句专项练习含答案一、单选题1. —______ is the movie?—Almost three hours.A. How oftenB. How muchC. How soonD. How long答案：D2. The news that the school building had been on fire made us _______.A. shockedB. to shockC. shockingD. shock答案：A3. It is required that the teacher _______ to school on time.答案：B4. _____ makes water boil?A. What is it thatB. What it is thatC. Is it what thatD. Is it that what答案：A5. I don’t think it advisable that the plan_______ without further discussion.A. will be carried outB. has been carried outC. be carried outD. is carried out答案：C二、完形填空I was walking along a path in the park one day. Suddenly I saw a bag on the grass __1__ me. I __2__ the bag and looked around. There was nobody near me. I opened the bag and saw __3__ inside. It was an expensive camera(相机). There was also a piece of paper __4__ the camera.The paper said, "I __5__ this camera in your __6__. I do not need it any more and I want you to have it. I have left my name and address in the envelope(信封)," I looked inside the bag and found the __7__. The name and address was there.I __8__ the envelope and put the camera back in the bag. Then I__9__ the bag and continued my walk. I kept __10__ the camera. I felt happy and knew that __11__ day would bring good luck to me.4. A. with B. over C. in D. under答案：A10. A. looking at B. looking afterC. looking forD. looking up答案：C三、阅读理解There is a man who never uses his feet. He didn't walk anywhere and people had to carry him everywhere. One day he heard about a doctor who could help him to use his feet. He went to the doctor and told him his problem. The doctor told the man that he would give him some medicine and a piece of paper. He told him to put the piece of paper in his shoes. One week later the man came back and thanked the doctor. He said, “It works。
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主语从句练习
单项选择题
1._____ as much as one-fifth of all timber harvested is not used.
A. The estimate
B. The estimate
C. They are estimated
D. It is estimated that
2._____ was once regarded as impossible has now become a reality.
A. That
B. Which
C. Who
D. What
3._____ we have achieved is attributed to the guida nee of our pare nts.
A. Whoever
B. Whatever
C. However
D. That
4._____ you say now can ' t make up for what you ' ve^Sone.
A. No matter
B. Whatever
C. However
D. That
5.Although ______ happe ned in this developed country sounds like scie nee fiction, it
could occur elsewhere in the world.
A. which
B. what
C. how
D. it
6._____ she had forgotte n to take her no tebook.
A. That occurred to her
B. She occurred that
C. To her that occurred
D. It occurred to her that
7.I am sure that _____ she said is wrong.
A. which
B. all
C. this
D. what
8.We lost our way in the forest, and _____ made matters worse was that it
was
gett ing dark.
A. that
B. which
C. it
D. what
9._____ occurred to him that he had forgotte n to lock the door whe n he left home.
A. This
B. It
C. That
D. These
10.or not is still un certa in.
A. He'soming
B. If he is coming
C. That coming
D. Whether he' coming
11.It ' _ he' be able to come.
A. doubt whether
B. doubtful
C. doubt it
D. doubtful whether
12.It is ____ that the bridge has existed for more tha n three cen turies .
A. appeared
B. rise n
C. said
D. born
13._____ he saw both surprised and frighte ned him.
A. That
B. When
C. What
D. Which
14._____ is a spell of warm sunshine.
A. What do we all need.
B. What all we n eed
C. What we n eed
D. What we all need
15._____ is a pity that he should feel so upset.
A. What
B. That
C. He
D. It
16._____ a spo onful of soil can tell us so much about the structure and early history of the moon.
A. Remarkable
B. Quite remarkably
C. It is remarkable that
D. It is remarkable
17._____ you nomin ate will be elected.
A. Who
B. Which
C. Whomever
D. That ' s
18._____ book you borrow must be retur ned with in a week.
A. What
B. Which
C. Whichever
D. That ' s
19._____ is troubling me is that I don ' t have much experienee in intern ati onal commerce.
A. It
B. That
C. Which
D. What
20._____ they wil go there to try ano ther experime nt has not bee n decided
yet.
A. Whether
B. If
C. About whether
D. Why
根据提示，完成句子。
1.________________________________________ hasn ' t been decided yet.(pick)
谁将去接他还没有确定。
2.________________________________________ rema ins unknown .(fi ni sh)
我们是否能按时完成工作还不知道
3.____________________________________________ is none of my bus in ess.(like)
你喜不喜欢他都与我无关。
4._________________________________________________ i s being discussed.(abroad)
他将何时出国正在讨论之中。
5._________________________________ in lear ning En glish is eno ugh
practice.(matter)
英语学习中最重要的是足够的练习。
6.It worried her a bit ______________________________________________________ .(tur n)
她的头发正在变白让她有些担忧。
7.After Yang Liwei succeeded in circli ng the earth,
_________________________________ our astr on auts walk in space. (desire)
杨利伟成功地环绕地球后，我们希望的是宇航员在太空漫步。
8._________________________________________________ s hould be pun ished.(break)
任何违法的人都应该被惩罚。
9.______________________ we can lear n four foreig n Ian guages at the same
time.(seem)
我们能同时学四门外语似乎不可能。
10._____________________________________ was that more tha n 90% of the stude nts had bee n admitted to the key uni versities.
让这所学校感到自豪的是超过90%的学生被重点大学录取了
主语从句
I— 5 DDBBB
6 —10 DDDBD
II—15 DCCDD
16 —20 CACDA
1.Who will pick him up
2.Whether we can finish the work on time
3.Whether you like him (or not)
4.Whe n he will go abroad
5.What matters most
6.that her hair was tur ning grey
7.it ' s desired that
8.Whoever breaks the law
9.lt seems impossible that
10. What made the school proud。