用所给词的适当形式填空。
1. Listen, Jim ______(sing) an English song in the music room.
2. What ____ Helen often _____(do) at the weekends?
3. How many _____(child) are there in your class?
4. Don’t _____(talk) to the strangers.
5. We _____(live) in a small house last year.
6.There are lots of _____(bus).
7. Ten years ago, he _____(teach) Chinese.
8. It’s time _____(have) lunch now.
9.What ____ he ____(look) for?
---He is looking for his eraser.
10. She _____(not visit) her aunt last Wednesday.