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.
