用所给词的适当形式填空。

1. We think she         (be)a good singer in the future.

2. What         you         (do) at 4:30 p.m. yesterday?

3. I         ( shop)in a supermarket when you called me up.

4.          the dog         (lie) under the tree when you passed?

5. While it          ( rain) heavily,he went out.

6. The train usually         (leave) the station at ten o'clock in the morning.

7. Look! The girls         ( dance) there.