给美国笔友写信,怎么写?

Dear my friend
I am learning in a American university now .I love sports very much .I am interested in the American sport
Can you tell me something about them I will thank you very much .
Best wishes !
your friends
xxx
上面只是范例 你可以自由发挥 例如添上你喜欢什么运动 对朋友的问候 视情况而定