Dear Mark,
I heard of you were ill again.I am worried about you,please take care of yourself.You'd better drink water always and do more exercise.In that case,your body will be stronger and studis will be better.Best wishes for you.
Your friend Tom
不知道是不是初一的水平,你自己再改改吧,还有就是以后别来问了,学习是自己的事情.go.fighting.