用动词的适当形式填空:
1. ____________（support）his family, he had to work hard in a chemical works. 2. I noticed him ______（slide） into the room through the back door.
3. Scientists are working on a new vaccine （疫苗）____（rid）the country of the terrible disease.
4. Respecting others is _____(repect) by others.
5. The museum had several painting ______(represent) the artist’s early style. 6. Everything worth _____(regret) is gone and there is nothing ____(regret) now.
7. The book _____(refer to) in the report is very popular with young people. 8. The consumer demand （消费需求）______ (reduce) at present will influence the profits of the company.
9. The police ____(react) to the emergency
were praised by the people. 10. Food ______(preserve) in the referegerator won’t go bad easily.
11. She tried ____(pick out) the tune of a song she had heard on the radio.
12. He is afraid ____ (pick out) in front of som many people.
13. Bad table manners ______(can observe) here and there in China. 14. Diligence （勤劳）is the path _____(lead) to happiness.
15. Small children don’t like the books ____(intend) for adults.
16. Many goods _____ (export) to Europe are now produced overseas.
17. ____(expand) his business is his next plan.
18. The television program is designed _____(educate) and not just ____ (entertain).
19. The pizza ______(deliver) this morning will reach you this afternoon.
20. Many young people joined the army ____ （defend） the country.
21. They were locked in a small room, completely ______(cut off) from the outside world.
22. The data (数据) we have collected is not enough _______(convince).
23. Great care should be taken to avoid ______(confuse) the two types of projects. 24. Suddenly I saw a tall man ______(approach) the police man.
25. He was far from ________(satisfy) with the way the things were done.
26. I think it is a waste of time _______(argue) about it.
27. Within a few minutes, Mrs Pross stood ______(whisper) at his side.
28. He left the party a few seconds before