Dear Sir/Madam:
I'm sorry that I can't take your class this Monday, for I've got to go to the hospital. I felt quite sick the night before and have an appointment with the doctor on Monday morning. Please forgive my absence and taking the day off.
And I'm afraid I need another half-day rest on Thursday, for I have to be re-examined at the hospital as well.
I really need your permission. Thank you very much.
Yours Sincerely
XXX
追问you like Shakespeare
追答不好意思,从没看过那老儿的原著,看着有困难……