I feel very sorry about my behave. I didn't work hard, so I failed the exam.It is none business of you. But I said so many bad words to you.I beg your pardon. You can give me a chance to change myself.I will have good marks to face you.Yours,Student
Dear friend,
I apologize for my behavior yesterday. I wasn't able to come yesterday to play ping pong with you because on of my classmates fell ill in class and I had to take them to the hospital. I happened to leave my cellphone at home, so I couldn't contact you immediately. I'm really sorry about that. If you understood my situation and forgive me, I would like to go see a new movie with you on Sunday afternoon.
Sincerely,
Your friend