根据中文提示写一封60~80词的英文信.

问题描述:

根据中文提示写一封60~80词的英文信.
提示:Ann邀请Mary参加她本周日的生日聚会,但Mary的父母出差要下个月回来,奶奶又卧病在床,需要人照顾.而且英语考试即将来临,因此Mary无法前去参加生日聚会.她感到很抱歉,只好写封信表达歉意.

Dear AnnI am very glad to receive your birthday invitation. I'd like tobut I am afraid I can't go to your party this Sunday. Because my parents are on business and they won't be back until next mont...