1. 给下列句子选择合适的答语。

A. No. There are four. B. It's eating fruit and vegetables. C. He is my brother. D. He is riding a bike. E. No, they are playing chess.

1. （1） Who is that boy?
3. （2） What is Tom doing?
5. （3） There are three chickens in the photo.
7. （4） There are two girls. They are running.
9. （5） There is a pig in the photo.