继续高分求：四级水平英语作文一篇你曾经向你的好友借了一本很有用的书,但被你丢了,你给他写一封致歉信,说明丢失的全过程,及补救的办法.

Dear ***,
Hello.Thanks for lending me your book,it was useful to me.But I am sorry to tell you that I have lost it.One morning,I went to school by bus as usual,taking the book with me.When I got off the bus,I left it behind.I tried to go after the bus to get back the book,but it was so fast,and I failed.I know I did a silly thing.***,I am extremely sorry for that.But I would like to buy another for you,or give you back the money.What should I do?Looking forward to your reply.
Best wishes
Yours
***

Dear friend,I am very sorry to take up your time and interrupt you.I need to express my apology to you due to the fact that I lost the book which you lent to me several days ago.Yesterday,I went to th...