【正确答案】[参考范文]

Jan. 7th, 2012
Dear Mr. Zhang,
Now I am writing to you to express my apology for the damage of your computer during my stay in your house when I visited Beijing a few days ago.
It is just because of my carelessness that I damaged your computer. I understand it must bring you a lot of trouble and inconveniences, so I feel extremely guilty for what I have done to you. In order to compensate for your loss, I decide to buy you a new computer and send it to you by EMS.
Please accept my sincere apologies and forgive me for my ridiculous carelessness.
Yours sincerely,
Li Ming

【答案解析】[基本套路]
道歉信是日常生活和交际活动中常用的书信形式。主要用来表达歉意，解释愿意以及提出补救办法等，所以道歉信一般包括：写信目的，为何道歉，提出补救办法。