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问题: 用适当的情态动词填空。

用适当的情态动词填空:
1.[22] I ___ put off the meeting if they _____ not come in time.
2.[14] You ____ do the work this evening, tomorrow will still be soon enough.
3.[30] The baby _____ be ten months old. It ____ stand now.

解答:

1. will\have to\can
2. needn't
3. must ; can