—       . It must be very interesting.

Tom邀请李萍参加他明天的生日宴会，但她无法前去参加，因为她有很多事要做。

提示:1）她的父母正在云南旅游,他们要到后天回来;

2）奶奶卧病在床,需要人照顾;

3）英语考试即将来临.她不得不为考试做准备。

Dear Tom,

    Thank you very much for inviting me to your birthday party.

I will see you    the month.

Do you often  your aunt?

He    to Beijing with his family last month.