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