初级写作  (本题一节，计15分）你们班的交流生Mary 来自英国。本周六她要在家举办生日聚会，邀请你去参加。 请你根据邀请函和提示，适当发挥， 写一篇80词左右的信婉言拒绝她的邀请。

Birthday Party! Please come to my 13th birthday party.          Saturday, October 24th, 5:00 p.m. My house, No. 25, West Street.                                  Mary

提示： 1. 上午参加英语竞赛；2. 下午去足球俱乐部；3. 晚上去看电影。

Dear Mary, Thank you for your invitation.                                                                                                                                                                                                                                                                                                                                                                                                                                                 I wish you a happy birthday. Mike