单项选择题

Man cannot prevent the world from being polluted because ______.

A．people use too many man-made materials
B．the pupulation of the world is increasing faster
C．we are producing more cars, trucks and buses
D．we have more and more industry

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单项选择题

What does the writer really want to say in the passage

A．As industry is growing fast, pollution is the natural result.
B．It's time we did something to reduce pollution.
C．We should control the speed of the development to stop pollution.
D．With the development of technology, pollution has become a serious problem.

单项选择题

The passage suggests that ______.

A．a good writer is always a good speaker
B．a good writer may not be a good speaker
C．a good writer will find himself speechless
D．a speechless person always writes well