1. 看图，选择正确的序号。

A. Yes, I am. B. No. I'm not. C. Yes, he is. D. No, he isn't. E. Yes, she is. F. No, she isn't.

1. （1） —Are you writing a letter?

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3. （2） —Is she drawing a picture?

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5. （3） —Is he tidying his room?

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