名词性从句测试题及答案
一、名词性从句
1．It was never clear ________ the man hadn't reported the accident sooner.
A. that
B. how
C. when
D. 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． 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。
3．Has it been announced ______?
A. when are the planes to take off
B. that are the planes to take off
C. where are the planes to take off
D. 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。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; that
B. it; that
C. it; because
D. 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。
5．They lost their way in the forest, and ___ made matters worse 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 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。
6．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。
7．________ we may find interesting is that it usually takes more to be polite.
A. That
B. What
C. Which
D. /
【答案】 B
【解析】【分析】句意：我们可能会发现有趣的是通常需要更多的礼貌。此处是主语从句做主语，从句没有引导词，缺少宾语，故答案为B。
【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．They lost their way in the forest, and ________ made matters worse was that night began to fall.
A. that
B. it
C. what
D. 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。
9．It matters little ______ a man dies, but _____ matters much is ______ he lives.
A. how; what; how
B. how; it; how
C. why; it; why
D. that; what; that
