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下面共有15个句子，每个句子中均有1个词或短语划有底横线，请从每个句子后面所给的4个选项中选择1个与划线部分意义最相近的词或短语。

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 little

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

答案：1. A 2. C 3. C 4. D 5. B6. A 7. A 8. B 9. D 10.B11. D 12. A 13. C 14. B 15. A