题目内容

Before the end of the nineties, air pollution ______ a serious problem that endangers the health of the human race.

A. will be become
B. will become
C. will have become
D. will have been become

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The train ______ at eight tonight.

A. will be started
B. will have started
C. shall be started
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We ______ an English evening tonight.

A. are being having
B. are having
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A. are leaving
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_____ me or aren’t you?

A. Will you help
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C. Are you going to help
D. Will you have helped