根据所给词的适当形式填空。
1. 90% of the class enjoyed ____________ (he) during the winter holiday.
2. It is______________ (possible)for me to design the poster without your help.
3. The police ________ (search) the robber at that time last night.
4. When I got to the theater, I realized that I _________ (leave) the ticket at home.
5. December is the __________ (twelve) month of a year.
6. You'd better plan your free time ________(wise). Don't play too many computer games.
7. --What do your father and uncle do?
--They are __________ (sa
lesman) and they sell all kinds of robots.
8. --I want to teach in the western areas.
--Well, teachers ____________ very much there. (need )
9. Look! There is a new ___________ (wash) machine near the window.
10. My cousin refused ___________ (keep) secrets for me.
1. themselves 2. impossible 3. were searching 4. had left 5. twelfth
6. wisely 7. salesmen 8. are needed 9. washing 10. to keep