以适当的形式填空。
1. Mary and Joe go to the Shopping Center ___________ .
a. once a week b. in a week c. next week d. for a week
2. Be quiet! The baby ________ （sleep）in the next room.
3. Dick will pass the message on to your sister as soon as he ______ （meet）her in her office tomorrow.
4. The bell for the class rang while they ___________ （play）on the playground.
5. Lucy said it ___________ （rain）later on.
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