30.　 because they have paid little attention to the care of their eyes.

环境保护/生态平衡

29.　 Now more and more students are getting near-sighted in schools,

28.　 Regulations should be laid down for taxi drivers.(应该专门为出租车司机指定交通规则)

27.　 Nowadays, taxies bring people a lot of convenience, but also cause a lot of trouble.

26.　 There are many ways of keeping good health.

25.　 Therefore, we should be aware of(注意) when to watch, how to watch, and what to watch.

24.　 As we all know, spending too much time on TV may have bad effects on our work and health, especially on our eyes.

23.　 As future builders of our country, we should make full use of our

a)　　 time to work hard ,and do things to benefit our country.

22.　 My suggestions are as follows.

21.　 Millions of smokers die from illness caused by smoking tobacco.