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单项选择题

The chairman proposed that (every speaker) (must) limit (himself) (to) fifteen minutes.

A. every speaker
B. must
C. himself
D. to
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单项选择题(Whom) (do you think) is the (most) popular sports star (at) the moment

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单项选择题______ a lot of money made the study abroad possible for him.

A. Tom saved
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D. Tom's having saved