Dear teacher,
I'm terribly sorry that I lost your book the other day.
Here,I apologize for my carelessness,and I will try my best to find a book the same as yours for compensation.
Could you forgive me for my fault,my dear teacher?
I promise that I will be more careful from now on.
Look forward to your reply.
Thanks very much.
yours,
XXX
希望能帮到你哦~~~