步行有益健康-Walking is good to popls halth
题目要求：写一篇 100 ～ 120 字的短文。说明步行有益健康。（内容自选）
范文：
Walking is good to popl＇s halth
As vryon knows， ithr fast walk or slow walk dos good to th muscls （肌肉） and lungs of human. So popl walk to build up thir body， or to los wight. But only som of thm know that taking a walk vry day is also good for protcting man＇s hart. Hart attack has bcom th first disas in th world bcaus most popl suffr from it.
Taking a walk can improv th blood supply to our hart. If you try to walk as oftn as possibl， you＇ll hav a halthir hart.
