问题

The mom was so young that she was always worried about how to ______ her baby.

A:may do
B:must do
C:may be done
D:must be done;

正确答案是：

同类题型

Paul attends very ________ meetings，and when he does，he has very ________ to say．

The question that puzzles them is ___they can finish the work on time.

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Tony was very unhappy forto the party.[ ]

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