1. 为下列句子选择正确的答语。

A. There are four boxes. B. It is a gift. C. I go to the park on foot. D. I am waiting for my mother. E. We sang and danced.

1. （1） —What's that?

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3. （2） —How many boxes are there in the room?

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5. （3） —What did you do together?

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7. （4） —How do you go to the park?

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9. （5） —Why are you standing here?

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