Dear Susan,
I'm sorry to have argued with you.You are my best friend,aren't you? So please forget it.
I like that book very much, so when you lost it, I was angry . Now I know I am wrong because everybody makes a mistake. I hope you will forgive me when you read my letter. We are still good friends. We should help each other. We should understand each other. Is it right?
I'm sorry again.
Yours ever,
Sally
自己写的,仅供参考哦~ 你可以适当补充内容.加油~