用括号内所给动词的适当形式填空。
1. Look! Someone ___________ (lie) on the floor. What is happening?
2. If it ___________ (snow) tomorrow, we won't go to the cinema.
3. His friends did all they could ___________ (help) him out of difficulty.
4. On May 12, 2008, a strong earthquake ___________ (hit) Sichuan, it killed many people.
5. ___________ (spend) too much time playing computer games is bad for our eyes.
6. We must prevent hunters from ___________ (kill) the animals.
7. Many changes ___________ (take) place in our daily life since the invention of the computer.
8. One of the cleaners ___________ (remove) the snow from 5 to 7 yesterday morning.
9. The boy is very happy because he __________ (sell) out all the newspapers.
10. There __________ (be) two football matches in your school, are there?
