[单项选择]In the past 10 years, the company has gradually ______ all of its smaller rivals.
A. engaged
B. occupied
C. monopolized
D. absorbed

[单项选择]In the past 10 years, the company has gradually______all of its smaller rivals.
A. engaged
B. occupied
C. monopolized
D. absorbed

[单项选择]In the past twenty years the replacement rate has been falling in every country.

[单项选择]The survey has revealed that in the past 40 years the public faith in the American government has dropped by ______.
A. 67 percent
B. 51 percent
C. 35 percent
D. 16 percent

[单项选择]In the past few years the school has _____ a lot of money improving the teaching equipment.
A. cost
B. paid
C. spent
D. taken

[单项选择]Over (the past) 20 years, the Internet has (helped change) our world in (either) way or another (for the better).
A. the past
B. as well as
C. to dinner
D. neither of

[单项选择]______in the company for three years, Mark has become experienced in business negotiations.
A. Having worked
B. Have been working
C. Have worked
D. Worked

[单项选择]________ in the company for three years, Mark has become experienced in business negotiations.
A. Having worked
B. Have been working
C. Have worked
D. Worked

[单项选择]Over the years jazz has changed and developed but it has essentially ______ its fundamental characteristics.
A. remained
B. retained
C. reserved
D. resumed

[单项选择]In recent years there has been a ______ increase in the cost of living; many families have to depend on the federal aids.
A. ponderous
B. powerful
C. significant
D. violent

[单项选择]She has been in Tianjin for ten years. Tianjin has become her second ______.

[单项选择]

Passage Four For some time past it has been widely accepted that babies and other creatures learn to do things because certain acts lead to" rewards"; and there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiological "drives" as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise. It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome. Papousek began his studies by using milk in the normal way to "reward" the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response w
A. have the lights turned on
B. be rewarded with milk
C. please their parents
D. be praised

[单项选择]How many years has the testing been suspended


A. Eight
B. Seven.
C. Six.
D. Nine.