1.The board of the company has decided to ________ its operations to include all aspects of the clothing business.
A) multiply
B) lengthen
C) expand
D) stretch

2.His business was very successful, but it was at the ________ of his family life.
A) consumption
B) credit
C) exhaustion
D) expense

3.First published in 1927, the charts remain an ________ source for researchers.
A) identical
B) indispensable
C) intelligent
D) inevitable

4.Joe is not good at sports, but when it ________ mathematics, he is the best in the class.
A) comes to
B) comes up to
C) comes on to
D) comes around to

5.Doctors warned against chewing tobacco as a ________ for smoking.
A) relief
B) revival
C) substitute
D) succession

6.When carbon is added to iron in proper ________ the result is steel.
A) rates
B) thicknesses
C) proportions
D) densities

7.You should try to ________ your ambition and be more realistic.
A) reserve
B) restrain
C) retain
D) replace

8.Nancy is only a sort of ________ of her husband’s opinion and has no ideas of her own.
A) sample
B) reproduction
C) shadow
D) echo

9.Now that spring is here, you can ________ these fur coats till you need them again next winter.
A) put over
B) put away
C) put off
D) put down

10.There is a ________ of impatience in the tone of his voice.
A) hint
B) notion
C) dot
D) phrase

作业：

1.Having spent some time in the city, he had no trouble ________ (找到去历史博物馆的路).
2.________ (为了挣钱供我上学)， Mother often takes on more work than is good for her.
3.The professor required that ________ (我们交研究报告)。
4.The more you explain, ________ (我愈糊涂).
5.Though a skilled worker, ________ (他被公司解雇了) last week because of the economic crisis.