Tom,
I am indeed very sorry that I can't go to Beijing with you next weekend,which I have promised.I
feel sorry for it and want you to know what happened.
Just now,my cousin,Li Qing,who left home to Australia for his further study last year,informed
me that he would return this Saturday morning and asked me to pick him up at the airport with his family.You know,we haven't seen each other for nearly a year.
I sincerely hope you can accept my appreciate your allowing me to make another date to show you
around Beijing.Once again,I'm sorry for any inconvenience caused.
All the best
Li Hua
答案不唯一