中考英语作文指导第七讲：中考真题How to protect your eyesight

题材：说明文 1. you should not keep your eyes working for a long time 2.   you should keep your book about a foot away from your eyes when you do some reading． 3. Don＇t read in weak light or in the sun and don＇t read in the moving bus or in bed． 4. keep doing eye exercises every day.