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