Dear Bob,
I am writing this letter to apologize for my mistake of forgetting to return your music CD to you. I find the music CD in my luggage when I go home.
There are two measures to solve this problem. First and foremost, I can post this music CD to your home. In addition,my friend Xiao Ming will go to Canada in next months,I can ask him to bring this music CD to you.
I really want to know which solution you will choose.I am looking forward to your reply at your earliest convenience.
Your Sincerely
Li Ming