1. 情景对话。

A. I'm going to swim. B. She's at home. C. I want a hot dog. D. I'm cleaning my room. E. No, I'm not.

1. （1） —What are you doing, Sam?

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3. （2） —Are you in the park?

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5. （3） —Where's your mum?

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7. （4） —What are you going to do today?

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9. （5） —Can I help you?

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