1.A year later，with the nation‘s economy ________， Bush’s approval rating dropped below 40 percent. 【 B】
A. in power
B. in trouble
C. in hand
D. in part
【答案解析】：in trouble：陷入困境。由于经济陷入困境，所以支持率下降了很多，符合句意。
2.There is the appreciation of the salient historical truth ________ the aging of advanced societies has been a sudden change. 【C】
A. which
B. what
C. that
D. how
【答案解析】：本句中that引导的也是同位语从句。
3.Robots differ from automatic machines ________ after completion of one specific task，they can be reprogrammed by a computer to do another one. 【B】
A. in case
B. in that
C. in which
D. in time
【答案解析】：in that意思是：在于，因为。解释differ from automatic machines的具体方面。
4.Basically，these attitudes amount to a belief ________ leisure can and should be put to good use. 【 B】
A. which
B. that
C. what
D. how
【答案解析】：空格前面是belief，后面是一个结构完整的句子，解释说明belief的具体内容。所以用that引导这个同位语从句。
5.The professor worked for 7 hours at a ________. 【 A】
A. stretch
B. extend
C. expand
D. prolong
【答案解析】：此题考查的是固定词组搭配。at a stretch一口气地。
6.If an earthquake occurred，some of the one-storey houses ________. 【D】
A. might be left stand
B. might leave to be standing
C. might be left to stand
D. might be left standing
【答案解析】：be left……：被置于……的境地。它是leave sth……的被动式。standing：站立的，固定的，直立的。be left加形容词是常用的一种表达方式。
7.________， he had no time to rest. 【 C】
A. As he was tired
B. If he was tired
C. Tired as he was
D. Now that he was tired
【答案解析】：译文：尽管他很累，他也没有时间休息。此题考查的是让步状语从句，从句中表语提前。
8.Since we have a focused subject， we should not talk ________. 【D】
A. at once
B. at hand
C. at intervals
D. at random
【答案解析】：译文：既然我们已经有了命题，我们就不应漫无边际地交谈。此题考查对固定短语的掌握情况。at once立刻；at hand在附近，在手头，即将发生；at intervals间或，不时；at random随便，任意。
9.Why do you blame him for his poor judgment on the matter ______ he really needs is encouragement？ 【C】
A. when that
B. since that
C. when what
D. now that
【答案解析】：译文：当他真正需要鼓励时，你为什么责备他的拙劣判断。此题考查准确判断句子结构。when引导时间状语从句，what he really needs充当这个时间状语从句的主语。
10.The doctors are ________ about the guidelines under which they can carry out euthanasia. 【B】
A. at a stretch Ｗww.KaＯ8.C
B. at a loss
C. at random
D. at length
【答案解析】：本题考查的是短语区分。A.不休息地，连续地；B.不知所措，茫然，不了解；C.任意的，随便的；D.最后，终于。句意：医生们不了解执行安乐死的准则。

11.With such a poor score in the entrance exam， it‘s ________ impossible for him to be admitted to this university. 【 B】
A. roughly
B. absolutely
C. fully
D. exclusively
【答案解析】：此题考查词汇。A.大约；B.绝对地；C.完全地；D.惟一的。句意：他入学考试分数很低，完全不可能被这所大学录取。
12.We promise that we‘ll meet again after we _______ our college education in three years’time. 【A】
A. finish
B. will finish
C. finished
D. will have finished A
【答案解析】：此题为主将从现，一般现在时用于从句表将来。译文：我们约定，大学三年毕业后我们将再次见面。
13.Although Tom is satisfied with his academic achievement， he wonders _______ will happen to his family life. 【 C】
A. it
B. that
C. what
D. this
【答案解析】：what引导宾语从句，并在从句中作主语。句意：尽管汤姆对自己的学术成就很满意，但是他想知道他的家庭生活将会如何？
14.Never before _______ so rapidly developing as it is today. 【 A】
A. has our country been
B. our country has been
C. has been our country
D. our country hasn‘t been
答案解析：此题考查倒装句。否定词位于句首，句子应该部分倒装。句意：我们国家从来没有像今天一样进步如此迅速。
15.Is it Shakespeare Theatre _______ you are going to watch the play The Merchant of Venice？【 A】
A. where
B. that
C. which
D. as
【答案解析】：where引导的定语从句修饰先行词Shakespeare Theatre.此处并非强调结构，将“Is it去掉后，可以看出，这个句子缺少介词，所以，如果在原句中Shakespeare Theatre的前面加上介词in或at，则成为强调句。
16.He would have given you more help， if he ________ so busy. 【B】
A. have not been
B. had not been
C. not have been
D. not had been
答案解析：本题考察与过去事实相反的虚拟语气。
17.After months of voyage， Columbus arrived in ______ later proved to be a new continent. 【C】
A. where
B. which
C. what
D. that
答案解析：注意，本句话并非定语从句，而是宾语从句。因为在介词in 后面，应该用what引导的宾语从句，what在宾语从句中作主语。
18.I was really anxious about you. You ______ home without a word. 【B】
A. mustn‘t leave
B. shouldn’t have left
C. couldn‘t have left
D. needn’t leave
答案解析：虚拟语气用法。句意：我（那时）真的很担心你。你本不应该不留个话就离开家。
19.He was ______ to withdraw from running for the presidency. 【C】
A. trusted
B. credited
C. convinced
D. believed
答案解析：句意：他被说服退出竞选总统。convince使相信；信服；说服。
20.While _____ the book， he nodded from time to time 【A】
A. reading
B. read
C. is reading
D. is read
答案解析：从句中动作的发出者和主句相同，用现在分词短语作时间状语。题意为：他一边看书，一边不时地点头。