根据句意，用括号内所给动词的适当形式填空。
1. They ______ (come) to China two months ago.
2. Where ______ (be) she last week?
3. The twins ______(be) at school this morning.
4. ______ he ______ (tell) you a story last Sunday?
5. We ______ (not watch) TV last night.
6. Let me ______ (help) you.
7. Listen! Sue ______ (sing) an English song.
8. I ______ (help) my mother do housework tomorrow.
9. Tom always ______ (get) up at six o'clock in the morning.
10. ______ (not close) the door.
