Dear Joe,
I'm sorry to hear that you didn't pass your English exam. But never mind, I think if you study hard, you can get good grades next time. Here are some of my advice. First of all, you should listen to the teacher very carefully in class.And after school you should do your homework by yourself. Then youshould always use English. You can read some English newspapers,and also watch some English TV programms. Do more practice, I think you can catch up with your classmates. Believe yourself!
Yours,
Tim
人称根据需要换,如字数多可删除一两句.