【1】
Dear Tom，
I am indeed very sorry that I can’t go to Beijing with you next week， which I have promised. I feel badly about it and want you to know what happened。
Just now， my cousin， Li Qiong， who left home to Australia for his further study last year，informed me that he will return this Saturday morning. And ask me to pick him up at the airport with his family. You know， we haven’t seen each other for nearly a year。
I sincerely hope you can accept my apologies and understand my situation. I would appreciate your allowing me to make another date to show you around Beijing. Once again， I’m sorry for any inconvenience caused。
Sincerely yours，
Li Hua
【2】
Dear Bob,
I am writing to express my apology to you for my failing to return your music CD before I came back.
Several days ago, I borrowed it when I lived in your house. Unfortunately, just now I found it in my luggage. I was in such a hurry that I forgot to return it to you. I will send it to you by post or express as soon as possible. If necessary, I will compensate for any troubles it may cause.
Once again, I feel so sorry for any inconvenience caused. Please accept my apologies.
Sincerely yours,
Li Ming
【3】
Dear Kate:
Excuse me for my long delaying in returning to you your “Robinson Crusoe” which I read through with great interest. I had finished reading the book and was about to return it when my cousin came to see me.
Never having seen the book, She was so interested in it that I had to retain it longer. However, I hope that in view of the additional delight thus afforded by your book, you will overlook my negligence in not returning it sooner. Thanking you again for the loan. Sincerely yours,
【4】
Dear David:
I am afraid that you will think me unpardonably negligent in not having answered your letter dated 7, December sooner, but when I have told you the reason, I trust you will be convinced that the neglect was excusable.
When your letter arrived, I was just in Hong Kong. As my family could not forward it to me during my absence, it has been, therefore, lying on my desk until the moment when I took it up. Now the first thing I have to hasten to do is to write to you these few lines to express my deep regret.
I enjoyed many pleasant sights during my trip. I shall be pleased to give you an account to of them when I see you next.