1. 从方框中选出下列各句的最佳应答语。

A．No，she．isn't． B．They are in the classroom． C．He is playing football． D．Yes，he is． E．No，I am not.

1. （1） —What is John doing?

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3. （2） Is Tom doing housework?

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5. （3） Are you cleaning the classroom?

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7. （4） Is Lucy washing the windows?

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9. （5） Where are the girls?

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