下面共有15个句子，每个句子中均有1个词或短语画有底横线，请从每个句子后面所给的4个选项中选择1个与画线部分意义最相近的词或短语。请将答案涂在答题卡相应的位置上。
1 These are the motives for doing it.
A reasons B excuses
C answers D replies
2 The river widens considerably as it begins to turn west
A extends B stretches
C broadens D bends
3 Many economists have given in to the fatal lure of mathematics．
A error B puzzle
C attraction D contradiction
4 With immense relief I stopped running
A no B 1ittle
C scarce D enormous
5 A great deal has been done to remedy the situation
A maintain B improve
C preserve D protect
6 John is collaborating with Mary in writing an article
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
A solving B exploring
C settling D handling
9.Hearing problems may be alleviated by changes in diet and exercise habits．
A removed B cured
C treated D lessened
10 The conclusion can be deduced from the premises
A gone B derived
C done D come
11 The food is insufficient for three people
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-
A evaluation B production
C efficiency D publicity