1. 用所给单词的适当形式填空

1. （1） Air pollution（be）a global problem.

3. （2） He was born in a ( wealth) family.

5. （3） It is(get) colder and colder now. Don't catch a cold.

7. （4） Today people live longer than they (do) in the past.

9. （5） The background music sounds (noise) , Please turn it down.

11. （6） Why is it important to (education ) people during their teenage years?

13. （7） The life(change) greatly since 1999.

15. （8） You have a(badly) cold and should have a rest.

17. （9） My grandmother is quite d, so you will have to speak up.

19. （10） I usually watched TV in my s time.

21. （11） My parents got(marry ) eighteen years ago.

23. （12） From now on, you must work (hard) than other students.

25. （13） The world is becoming smaller because the Internet brings us (close).

27. （14） Write as(careful) as you can and try to make no mistake.

29. （15） Gorge remained poor all (he) life.