单项选择题

The recording of eye-movements during sleep is （）.

A．a kind of experiment
B．to know how to deal with eye-movements
C．an unusual and dangerous recording
D．to know the exact time when eye-movements happen

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单项选择题

It isn't an easy job to carry out a general plan for birth control throughout the world because （）.

A．there are too many undeveloped countries in the world
B．undeveloped countries in the world
C．different governments have different views of the questions
D．even developed countries may have complex problems

单项选择题

Sales of films to theaters are often made only on the strength of the campaign．（）

A．影片能卖给影院是单纯依靠宣传的力量。
B．影片能卖给影院往往是依靠宣传的力量。
C．只有依靠宣传的力量才有人去影院看电影。
D．单纯依靠宣传的力量，影片不能卖给影院。