中考专项训练名词性从句X知识点总结含答案解析
必备英语中考英语 必备英语名词性从句技巧全解及练习题(含答案) 含答案解析
必备英语中考英语必备英语名词性从句技巧全解及练习题(含答案) 含答案解析一、初中英语名词性从句1．________ the weather will not clear up until next week is bad news for us.A. AsB. IfC. WhetherD. That【答案】 D【解析】【分析】考查主语从句。
句意：直到下周天气才放晴，这对我们来说是坏消息。
此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。
【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。
做题时注意看从句是否少成分。
2．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3． 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。
人教版中考英语九年级英语名词性从句知识点题型含答案解析
人教版中考英语九年级英语名词性从句知识点题型含答案解析一、初中英语名词性从句1．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。
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．_______is known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. 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。
中考英语总复习名词性从句复习含答案解析
中考英语总复习名词性从句复习含答案解析一、初中英语名词性从句1．____ 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。
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．______ makes the school proud is ______ more than 90% 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。
专项训练名词性从句经典例题含答案解析
专项训练名词性从句经典例题含答案解析一、初中英语名词性从句1．______ 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。
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 known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. 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。
人教版中考英语九年级英语名词性从句考点+例题-全面解析含答案解析
人教版中考英语九年级英语名词性从句考点+例题-全面解析含答案解析一、初中英语名词性从句1．They lost their way in the forest, and ___ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】本题中含有一个主语从句what made matters worse，其中的what引导起这个主语从句，同时在主语从句中做主语。
AC两项不能引导主语从句，which在引导名词性从句的时候总是含有疑问的语义，而本句中并没有疑问的语义。
句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
故D正确。
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．________ manners are very important in every country is known to all，but the trouble is that different countries have different ideas about ________ good manners are.A. That; whatB. That; thatC. What; thatD. What; what【答案】 A【解析】【分析】句意：众说周知，礼貌在每一个国家中都是非常重要的，但是麻烦是，不同的国家对于什么是良好的礼貌有着不同的认识。
名词性从句知识点总结及经典习题(含答案)经典
名词性从句知识点总结及经典习题(含答案)经典一、名词性从句1．______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。
______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。
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．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。
中考英语 名词性从句重点和解题方法含答案解析
中考英语名词性从句重点和解题方法含答案解析一、初中英语名词性从句1．________ the weather will not clear up until next week is bad news for us.A. AsB. IfC. WhetherD. That【答案】 D【解析】【分析】考查主语从句。
句意：直到下周天气才放晴，这对我们来说是坏消息。
此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。
【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。
做题时注意看从句是否少成分。
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．—What impresses you most when you visit the Acropolis ?— ________ it is that has brought the grand palace into today's terrible scene.A. WhereB. WhatC. HowD. When【答案】 B【解析】【分析】句意：——当你参观雅典卫城时，你印象最深的是什么？——使我印象最深的是什么将从前宏伟的宫殿变成了今天惨不忍睹的样子。
人教版中考英语中考英语总复习名词性从句总复习经典例题、习题含答案解析
人教版中考英语中考英语总复习名词性从句总复习经典例题、习题含答案解析一、初中英语名词性从句1．It is a rule in his family that _______ comes home first should cook the dinner.A. anybodyB. whoC. whoeverD. 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。
2．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3．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。
专项训练名词性从句经典例题含答案解析
专项训练名词性从句经典例题含答案解析一、初中英语名词性从句1．______ 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。
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 known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. 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。
专项训练名词性从句专项练习题含答案解析
专项训练名词性从句专项练习题含答案解析一、初中英语名词性从句1．—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。
第一空what作主语从句的主语；第二空为表语从句的that。
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．It matters little ______ a man dies, but _____ matters much is ______ he lives.A. how; what; howB. how; it; howC. why; it; whyD. that; what; that 【答案】 A【解析】【分析】句意：一个人如何死去并不重要，重要的是他如何生活。
中考英语名词性从句专项训练及答案及解析
中考英语名词性从句专项训练及答案及解析一、初中英语名词性从句1．_______is known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. 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。
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 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。
译林版中考英语九年级英语名词性从句-知识点归纳与练习含答案解析
译林版中考英语九年级英语名词性从句-知识点归纳与练习含答案解析一、初中英语名词性从句1．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。
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 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。
名词性从句专题(含答案)含答案解析
名词性从句专题(含答案)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．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3．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。
4．They lost their way in the forest, and ________ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
中考中考英语总复习名词性从句X知识点总结含答案解析
中考中考英语总复习名词性从句X知识点总结含答案解析一、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．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3．_______is known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. 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。
译林版中考英语中考英语总复习 名词性从句专项讲解及练习含答案解析
译林版中考英语中考英语总复习名词性从句专项讲解及练习含答案解析一、初中英语名词性从句1．________ the weather will not clear up until next week is bad news for us.A. AsB. IfC. WhetherD. That【答案】 D【解析】【分析】考查主语从句。
句意：直到下周天气才放晴，这对我们来说是坏消息。
此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。
【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。
做题时注意看从句是否少成分。
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．______ makes the school proud is ______ more than 90% 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。
中考中考英语总复习名词性从句综合分类解析含答案解析
中考中考英语总复习名词性从句综合分类解析含答案解析一、初中英语名词性从句1．________ the weather will not clear up until next week is bad news for us.A. AsB. IfC. WhetherD. That【答案】 D【解析】【分析】考查主语从句。
句意：直到下周天气才放晴，这对我们来说是坏消息。
此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。
【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。
做题时注意看从句是否少成分。
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．______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。
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中考专项训练名词性从句X知识点总结含答案解析一、初中英语名词性从句1．_______ you don't like him is none of my business.A. WhatB. WhoC. ThatD. 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。
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．______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。
______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。
4．________ 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.5．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。
6．It matters little ______ a man dies, but _____ matters much is ______ he lives.A. how; what; howB. how; it; howC. why; it; whyD. that; what; that 【答案】 A【解析】【分析】句意：一个人如何死去并不重要，重要的是他如何生活。
it为形式主语，how从句为真正的主语。
What matters much （=the thing that matters much）。
第一个how引导的是一个主语从句；it作形式主语；what引导的是主语从句；第二个how引导的是表语从句。
故选A。
【点评】考查名词性从句，本题涉及主语从句和表语从句的应用。
7．They lost their way in the forest, and ________ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
本题中含有一个主语从句what made matters worse，其中的what引导起这个主语从句，同时在主语从句中做主语。
故选D。
【点评】考查名词性从句，本题涉及what引导的主语从句的应用。
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． 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。
10．________ the weather will not clear up until next week is bad news for us.A. AsB. IfC. WhetherD. That【答案】 D【解析】【分析】考查主语从句。
句意：直到下周天气才放晴，这对我们来说是坏消息。
此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。
【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。
做题时注意看从句是否少成分。
11．______ will be in charge of the meeting has not been decided yet.A. WhatB. WhichC. ThatD. Who【答案】 D【解析】【分析】句意：谁将负责这次会议还没有决定。
______ will be in charge of the meeting是一个主语从句，从句中缺少主语，指人，故选D。
【点评】考查名词性从句，本题涉及who引导的主语从句。
12．They lost their way in the forest, and ___ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】本题中含有一个主语从句what made matters worse，其中的what引导起这个主语从句，同时在主语从句中做主语。
AC两项不能引导主语从句，which在引导名词性从句的时候总是含有疑问的语义，而本句中并没有疑问的语义。
句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
故D正确。
13．—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【解析】【分析】考查名词性从句的连接词。
第一空what作主语从句的主语；第二空为表语从句的that。
14．____ 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。
15．--- made her ashamed of herself?--- the lowest mark in her class.A. What; Because she gotB. Was it what; GettingC. What was it that; That she gotD. 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。