用所给单词的适当形式填空。

1. － _________ they _________ (do) their homework in the classroom?

    — Yes, they are.

2. There _________ (be) some people in the park.

3. — How much bread do you want?

    — I want two _________ (piece) of bread.

4. I find the girl _________ (dance) in the room now.

5. The women are the _________ (children) teachers.