单项选择题

Look at that little boy wandering about—perhaps he （）his mother.

A. will lose
B. is losing
C. had lost
D. has lost

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单项选择题

—How about your trip to Hainan — It couldn't have been （）. Sometimes I went swimming in the sea; sometimes I lay on the sand.

A. so well
B. as bad
C. better
D. worse

单项选择题

—I thought you wouldn't mind. — Well, as a matter of fact, I don't, but you （）me first.

A. should ask
B. should have asked
C. must ask
D. must have asked

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