51、In the desert,even a small cup of water may be a _______ of life or death.

（试题编号：186，试题类型：模拟）2.00分参考答案：C

A、fact

B、thing

C、matter

D、business

52、1.From the earliest time,it was _______ knowledge to the Peruvians that a white liquid would come out a rubber tree.

（试题编号：170，试题类型：模拟）2.00分参考答案：B

A、right

B、common

C、ready

D、ordinary

53、Children who are over-protected by their parents may become __________

（试题编号：209，试题类型：模拟）2.00分参考答案：C

A、huit

B、damaged

C、spoiled

D、harmed

54、I’d like to take this opportunity to __________ a warm welcome to all those present.

（试题编号：202，试题类型：模拟）2.00分参考答案：C

A、depress

B、impress

C、extend

D、.intend

55、We feel it is high time that we _____ something to slow down global warming.

（试题编号：234，试题类型：模拟）2.00分参考答案：A

A、did

B、do

C、must do

D、would do

56、She has been working in this factory ______.

（试题编号：160，试题类型：模拟）2.00分参考答案：A

A、since 1968

B、in 1968

C、for 1968

D、until 1968

57、Since she has never been in such a dangerous situation before,her _______ was understandable

（试题编号：168，试题类型：模拟）2.00分参考答案：D

A、eagerness

B、calmness

C、strength

D、fear

58、_______ years of enormous government support,few urban public transportation systems run at a profit

（试题编号：175，试题类型：模拟）2.00分参考答案：D

A、Based on

B、Due to

C、Because of

D、In spite of

59、He came all the way to China for promoting friendship _______ for making money

（试题编号：180，试题类型：模拟）2.00分参考答案：D

A、much than

B、more than

C、better than

D、rather than

60、It was difficult to guess what her _______ to the news would be

（试题编号：172，试题类型：模拟）2.00分参考答案：B

A、impression

B、reaction

C、comment

D、opinion