1、These are the motives for doing it. 【频率6次】
A reasons B excuses C answers D replies
2、The river widens considerably as it begins to turn west【频率6次】
A extends B stretches C broadens D bends
3、Many economists have given in to the fatal lure of mathematics．【频率4次】
A error B puzzle C attraction D contradiction
4、With immense relief I stopped running. 【频率10次】
A no B 1ittle C scarce D enormous
5、A great deal has been done to remedy the situation . 【频率6次】
A maintain B improve C preserve D protect
6、John is collaborating with Mary in writing an article. 【频率3次】
A cooperating B marrying C combining D arguing
7、He will consolidate his power．
A strengthen B win C abandon D unite
8、Many scientists have been probing psychological problems. 【频率3次】
A solving B exploring C settling D handling
9、Hearing problems may be alleviated by changes in diet and exercise habits．【频率3次】
A removed B cured C treated D lessened
10、The conclusion can be deduced from the premises. 【频率2次】
A gone B derived C done D come
11、The food is insufficient for three people. 【频率3次】
A scarce B short C marginal D inadequate
12、Most of the butterflies perish in the first frosts of autumn.
A die B disappear C migrate D vanish
13、But ultimately he gave in．
A undoubtedly B certainly C finally D necessarily
14、It is a complicated problem．
A strange B complex C difficult D unusual
15、In Britain and many other countries appraisal is now a tool of management. 【频率3次】
A evaluation B production C efficiency D publicity