请网友帮忙修改和加工一篇英语习作.Whyshouldwedoexercise?Now,Therearemoreandkindsofdiseaseinourlife,Theyarebadforourhealth,weshoulddomoreexercisesoastokeephealthy.Firstly,doingmoreexercisecankeepusfit.Se

　　请网友帮忙修改和加工一篇英语习作.

　　Whyshouldwedoexercise?

　　Now,Therearemoreandkindsofdiseaseinourlife,Theyarebadforourhealth,weshoulddomoreexercisesoastokeephealthy.

　　Firstly,doingmoreexercisecankeepusfit.Secondly,itcanmakeusstrongerstronger,itmakesusteenagers'lifebeeter.Thirdly,Wecaneasilyfightillnessanddiseasewithexercise'shelp.Infact,exerciseisthebestwaytobeatillness.Besides,Wecanalsodoexercisewhenwearetiredandsad.

　　Now,weknowexerciseisveryimportant.Let'sremembered,someexerciseadaykeepsthedoctoraway!