1. You must f_______ on your studies not computer games.

2. Children under 6 shouldn't go out alone. There is a r                 of being lost.

3. PC is short for p______ computer.

4. She kept s            all day because she lost her lovely pet.

5. He has to wear a pair of glasses, because his e                 was very poor.

6.When I ____ (grow) up,  I will build many roads in my hometown.

7. The boss forced me __________(do) the work until midnight.

8.The little girls does well in___________(play) cards.

9.We are ready to defend our city against _______(pollute).

10. The machine is used_________(produce) food.

11. We should not                 (争吵) with our parents.

12. I'm afraid we have to                 ( 取消) the meeting.

13. We want to live a healthy ____________(生活方式).

14.He is _________(害怕) of darkness.

15. He has many                 (敌人).