1.We can come to the ______ that the more we practice，the more skillful we will be. 【C】
A. tradition
B. generation
C. conclusion
D. fact
【答案解析】：像这类题考查单词的掌握，四个词意思不一样，就看哪一个放在句中逻辑上、语法上是正确的。这里come to the conclusion是一个固定词组，意指"得出结论"。
2.I wished it ______ but it did. 【 A】
A. had not occurred
B. occurred not
C. did not occur
D. would not occur
【答案解析】：本题考查的是虚拟语气的用法，表示的是与过去相反的情况，要用过去完成时，答案为A.
3.I have no choice ______ lay the facts before the public exactly as they occurred.【A】
A. but to
B. and to
C. with to
D. only to
【答案解析】：本题考查的是固定搭配的用法。have no choice but to do sth.表示"别无选择只能做某事"。
4.His illness accounts ______ his absence from class. 【 B】
A. to
B. for
C. over
D. after
【答案解析】：account for表示：是……的原因/理由。
5.______ a little earlier，I would have caught the train. 【 C】
A. Did I leave
B. Would I leave
C. Had I left
D. Have I left
【答案解析】：本题考查的是if引导的虚拟条件句，省略了if要把had提前。
6.I have no objection ______ for a hike on the mountains with Cynthia. 【 C】
A. to go
B. going
C. to going
D. of going
【答案解析】：本题考查的是have objection to doing sth的用法。
7.To some extent the good service at the hotel ______ the poor food. 【 D】
A. brought out
B. came about
C. got down to
D. made up for
【答案解析】：bring out：出版，生产；come about：发生，产生；get down to：开始认真考虑；make up for：补偿，弥补。
8.The manager would rather his daughter ______ in the same company. 【 D】
A. would not workＷww.KaＯ8.C
B. will not work
C. does not work
D. did not work
【答案解析】：本题考查的是would rather引导的虚拟语气的用法，是对现在的虚拟，所以要用一般过去时。
9.By the end of next month I ______ here for five years. 【 D】
A. will work
B. have been working
C. have worked
D. will have worked
【答案解析】：注意本题的解题关键是By the end of next month，所以要用将来完成时。
10.It was ______ that we went for a picnic in the country. 【C】
A. such nice a day
B. such nice day
C. so nice a day
D. so nice day
【答案解析】：本题考查的是so+形容词+a/an+名词的用法。

11.Some people who are very intelligent and successful in their fields find _______ difficult to succeed in language learning. 【 D】
A. which
B. how
C. that
D. it
【答案解析】：it在这里做形式宾语。句意为：一些在自己领域才智过人并且非常成功的人发现，在语言学习上取得成功是很困难的。
12.The Ocean is more than 4000 miles _______. 【 C】
A. wider
B. widest
C. wide
D. in wide
【答案解析】：空格处应该用形容词原形，more than 4000 miles wide：4000多英里宽。
13.Now you can see _______ you should consult the dictionary last， not first. 【C】
A. which
B. what
C. why
D. how
【答案解析】：宾语从句。you should consult the dictionary last， not first：你应该最后查字典，而不是首先去查。 分析句意和各选项的意思可以看出，答案是C.see在本句中意思是"明白"。
14.In one type of laboratory test all the variables _______ one are controlled. 【C】
A. by
B. and
C. but
D. or
【答案解析】：根据句子意思来确定答案，需要添入的词应该有"除了"的意思。句意为：在一类实验室测试中，除了一个变量外其余所有变量都在掌握之中。
15.Small _______ it is， an atom can still be seen. 【 B】
A. that
B. as
C. so
D. where
【答案解析】：本句属于as/though引导的让步从句，将表语或状语提前（形容词， 副词， 分词， 实义动词提前）。
16.They think in getting their materials， and also in _______ them，and in plastering them together with mud. 【A】
A. arranging
B. arrange
C. being arranging
D. arranged
【答案解析】：介词in后接动名词，所以正确答案为A.
17.I am in favor of his proposal that a special committee _______ to examine the problem. 【C】
A. set up
B. was set up
C. be set up
D. is setting up
【答案解析】：这里所要考查的是虚拟语气的用法，句子中的单词proposal后面的从句做它的同位语，从句中应该使用虚拟语气，形式为"（should）+动词原形"，再者，动词应该用被动语态，所以正确答案为C.
18.It has long been assumed _______ aggression is caused by male hormones. 【 B】
A. what
B. that
C. which
D. who
【答案解析】：本题考查的是引导词的用法，这里的句子主语是aggression is caused by male hormones，因为主语过长，所以后置，用形式it来替代，后面的引导词就需要用that，所以答案选B.
19.The actor was almost _______ most audience before he played that part. 【 B】
A. known of
B. unknown to
C. known for
D. unknown for
【答案解析】："这位演员在演这出戏之前几乎大多数观众都不知道他。""be unknown to "不知道，陌生。选B. unknown.
20.The fixed star was _______ a planet. 【D】
A. made of
B. made from
C. made up for
D. mistaken for
【答案解析】：be mistaken for：被误认为