第1个回答 2013-08-27
Dear Mary, I'm sorry to tell you that I can't join your birthday party on Sunday.My parents will go on a business trip and they can't be back until next week.Also,my grandmother is ill,so I have to look after her at home.Besides,the English exam is coming,I must prepare for it.Anyway,thank you for your invitation.I wish you a pleasant party. Yours Li Ming