【英语】名词性从句难题及答案
一、名词性从句
1．________ 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 earth
B. The sun and not the earth
C. Being the sun and not the earth
D. 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。分析句子可知，整个句子为主系表结构，was为系动词，它之前的都为主语，且主语由句子来充当，句子结构以及句意完整，所以连词代词为that。故选D。
【点评】考查名词性从句，本题涉及that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's sweet childhood memories.
A. what that B. which C. that D. 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．___ surprid me most was ____the girl pasd the driver test.
A. That; that B. What; how C. What; that D. That; why
【答案】 C
【解析】【分析】句意：最让我吃惊的是那个女孩通过了驾驶考试。 ___ surprid me most 是一个主语从句，从句中缺少主语，故填what； ____the girl pasd 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。
4． is even more important is the earth cooled down, water began to appear on its surface.
A. When; that; when B. What; whether; as C. What; that; as D. lt; whether; as
【答案】 C
【解析】【分析】这题考查从句的用法，第一空填what引导主语从句，在主语从句中what做主语，第二空填that引导表语从句，在表语从句中，as是引导时间状语从句，句意是：甚至更重要的是：随着地球的冷却，水开始出现在表面。选C。
5．_______ are playing an important part is well known to us all.
A. That who B. Tho who C. Who that D. Who
【答案】 D
【解析】【分析】考查主语从句。句意：谁起着重要作用，这是众所周知的。主语从句缺少引导词，从句缺少主语，故选D。
6．____ made me more unhappy was ___ the boy asked my friend to be his girlfriend and she agreed.
A. What; that B. That ; that C. What; whether D. It; that
【答案】 A
【解析】【分析】句意：让我更不高兴的是那个男孩要求我的朋友做他的女友，她同意了。第一空填what,它一方面在句子中引导主语从句,另一方面又在主语从句中作主语；第二空用that引导表语从句且从句中不缺成分,表示对前面情况的说明。故选A。
【点评】考查了名词性从句，本题涉及what引导的主语从句以及that引导的表语从句。
7．—Tell me something about your adventure in the rainforest, plea.
— We lost our way in the forest and ___ made matters wor was ___ night began to fall.
A. what; that B. it; that C. it; becau D. what; becau
【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。
8．They lost their way in the forest, and ___ made matters wor was that night began to fall.
A. it B. which C. that D. what
【答案】 D
【解析】【分析】本题中含有一个主语从句what made matters wor，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。
9．It is a rule in his family that _______ comes home first should cook the dinner.
A. anybody B. who C. whoever D. who that
【答案】 C
【解析】【分析】句意：在他的家里有个规定，就是先到家的人要先做饭。 whoever 有两个词义：1no matter who，在这种用法时引导一个让步状语从句；2anybody that，在这种用法时，它连接一个名词性从句，在本题中它连接的是主语从句。这里就是第二个用法。所以选C。
10．________ the weather will not clear up until next week is bad news for us.
A. As B. If C. Whether D. 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．______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A. Which B. What C. It D. 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。
12．It matters little ______ a man dies, but _____ matters much is ______ he lives.
