主语从句2—高考英语语法练习一次清（一轮复习）1._______ all the teachers believe is ______the hard work of students benefits them a lot.A. What, whichB. Which, thatC. When, thatD. What, that 【答案】 D【解析】句意：老师们认为努力总是有用的。
分析句子结构可知，第一空为主语从句，从句中的believe缺少宾语，所以第一空用what，is后的部分表语从句，从句成分完整，所以第二空用that起连接作用，故选D。
【总结】考查名词性从句，本题涉及what引导的主语从句；以及that引导的表语从句。
2.— _______ made her struggle to become an artist so hard?— ______ she was a woman.A. What; WhatB. That; ThatC. What; ThatD. That; What 【答案】 C【解析】句意：—是什么让她努力成为艺术家变得如此之难？—她是一个女性。
第一空作主语，表示“什么”，故用what，第二空是对what的回答，she was a woman既是一个句子又要作主语，而句子是不能直接作主语的，故在前面加个that，且that无实义，不作成分，故选C。
【总结】考查名词性从句，本题涉及what的应用，以及that引导的主语从句。
3.It is ________ he often breaks the schools rules ________ makes his teacher unsatisfied with him.A. what; thatB. that; whatC. that; thatD. which; that 【答案】 C【解析】意：正是他经常违反校规使老师对他不满意。
分析句子结构可知，第一空为主语从句，从句成分、意思完整，it是形式主语，用that只起连接作用，无实义；第二空为强调句型，其基本结构为：it is+被强调部分+that+其余部分，故选C。
【总结】考查名词性从句和强调句型，本题涉及that引导的主语从句，以及强调句型的结构“it is+被强调部分+that+其余部分”。
4.I was going to pay by cash when it suddenly occurred to me I had left my purse at home.A. whetherB. whatC. thatD. where 【答案】 C【解析】句意：我正要付现金，突然想起我把钱包忘在家里了。
it occurred to sb. t hat…固定句式，“某人突然想起某事”后跟that从句，故选C。
【总结】考查连接词辨析，以及固定句式it occurred to sb. that…。
5.___ surprised me most was ____the girl passed the driver test.A. That; thatB. What; howC. What; thatD. That; why 【答案】 C【解析】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。
【总结】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。
6.It has been pointed out ________ plays a vital role in driving away one's anxiety is one's sweet childhood memories.A. what thatB. whichC. thatD. that what 【答案】 D【解析】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。
【总结】考查名词性从句，本题涉及what引导的主语从句。
7.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】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。
【总结】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。
8.It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that 【答案】 B【解析】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。
【总结】考查主语从句的强调形式。
9.We believe you have been devoted to naturally of great necessity.A. that; beingB. all that; beC. that all; areD. what; is 【答案】 D【解析】句意：我们相信你所投入的自然是非常必要的。
分析句子可知，believe后接宾语从句，包含一个主语从句“you have been devoted to ”其中to为介词后接what作宾语，所以连接词为what，故what you have been devoted to 为主语，谓语动词为第三人称单数is。
故选D。
【总结】考查名词性从句和主谓一致，本题涉及what引导的主语从句。
10._____ makes this shop different is that it offers more personal services.A. WhatB. WhoC. WhateverD. Whoever 【答案】 A【解析】句意：这家商店的不同之处在于它提供更多的个人服务。
what引导名词性从句时本身有意义，即表示“什么”或“所……的事物”(="the" thing(s)that)，同时又在从句中充当一定的成分。
whoever引导名词性从句时相当于anyone who或those who。
whatever引导名词性从句时相当于anything that，故选A。
【总结】考查名词性从句，本题涉及what引导的主语从句。
11.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】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。
【总结】考查名词性从句，本题涉及what引导的主语从句。
12.________ 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】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。
【总结】考查名词性从句，本题涉及that引导的主语从句。
13._______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】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。
【总结】考查名词性从句，本题涉及主语从句和同位语从句。
14.________ 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】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。