Television keeps us informed about （）events and the latest developments in politics and science.

Such problem （）air, water, and noise pollutions are becoming more and more serious in some big cities.

A.like
B.as
C.of
D.about

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I really hope that you will （）your trip to Canada and get back as soon as possible when people have to knowledge of the law.

A.prefer
B.refer
C.enjoy
D.i nfer

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