根据句意用所给动词的适当形式填空，必要时可加情态动词。
1. Peter ________ (come) here tomorrow, but I'm not quite sure.
2. ________ people ________ (use) money in 100 years?
3. — What were you doing when the UFO took off?
— I ________ (watch).
4. Thank you so much for ________ (invite) me.
5. You ________ (have) your lunch already, haven't you?
6. I ________ (not see) my aunt for a long time
7. If you work hard enough, you'll find a good way ________ (learn) English better.
8. — Have you ever been to Qingdao?
— Yes. And I ________ (stay) there for half a month.
9. — Who usually ________ (wash) the dishes in your home?
— My mother does.
10. He asked whether I ________ (be) interested in English.
