单项选择题

He is still not here, he （）.

A. may miss his plane
B. could miss his plane
C. should-have missed his plane
D. may have missed his plane

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单项选择题

All substances, ______, liquid or solid, are made up of atoms.

A. be they gases
B. whether they are gases
C. they are gases
D. they can be gases

单项选择题

I believe watching TV is ______ listening to radio.

A. so good or better than
B. like good or better than
C. as good as or better than
D. as good as or better

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