. The air is getting much ____ than it was a few months ago.
A. clean B. cleaner
C. cleanest D. the cleanest
—____ do you have PE? —Three times a week.
A. How many B. How often
C. How old D. How much
I’ll have an exam tomorrow, ____ I want to go to bed early.
A. so B. or
C. but D. for
—Where do you usually have lunch?
—____ school.
A. Of B. To
C. At D. On
Eric is ____ best friend and he often helps me in art class.
A. my B. your
C. its D. her
近年来，中小学生的健康问题日益引起人们的关注。请你以How to keep healthy 为题，写一篇80词左右的短文，谈谈你的看法和建议。
要求：主要包括以下内容，可以适当发挥。文章开头已给出，不计入总词数。
1.列举中小学生面临的健康问题，如go to school without breakfast, play computer games, watch TV, drink or smoke,,,
2.提出保持健康的合理建议；
3.发表自己的看法。
How to Keep Healthy
Everyone needs to keep healthy today, especially we students. But we don’t know the importance of keeping healthy.__________________________________________________________________
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