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 We can no longer tolerate his actions．
A put up with B accept
C take 　　　D receive
7 Loud noises can be irritating．
A hateful 　B painful
C stimulating　D annoying
8 In the background was that eternal hum
A long B never-ending
C boring D extensive
9 The Constitution's vague nature has given it the flexibility to be adapted when circumstances change
A imprecise B apparent
C clear 　 D easy
10Gambling is lawful in Nevada．
A enjoyable B irresistible
C legal 　　　D profitable
11These are the motives for doing it
A reasons B excuses
C answers　 D replies
12The river widens considerably as it begins to turn west
A extends B stretches
C broadens　D bends
13 Many economists have given in to the fatal lure of mathematics．
A error 　　B puzzle
C attraction　D contradiction
14 With immense relief I stopped running．
A no 　B little
C scarce D enormous
15 A great deal has been done to remedy the situation
A maintain B improve
C preserve　 D protect
参考答案：ACCDB ADBAC ACCDB

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