请根据提示要求写一封电子邮件。

　　提示：假如你是黄燕，你的朋友给你发E-mail邀请你到她家过周末，但你因为有事不能去，请你发E-mail把情况告诉她。要包括以下内容：

　　 1.感谢邀请，婉言谢绝。   2.说明理由。（不少于两件事）

　　 3.邀请她下个星期天到你家来。

　　要求： 1.文中不能出现真实的班级和姓名。2.字迹工整，条理清晰。

　　   3.不少于60词。

　　Dear Xia Lei,

　　Thanks for______________________________________

　Yours,

Huang Yan

阅读下列短文，完成任务A和B。

Introduction  to  invitations（邀请活动简介）

Invitations are important. In the west, people often give invitations to their friends. Most invitations are for dinner or a birthday party.

   When people accept（接受）an invitation to a dinner or party, they usually ask what they can bring. They often take flowers, chocolates, or other presents. People usually take a birthday present to a birthday party.

After a dinner or birthday party , most people telephone the host（主人）to say “thank you”. Some people write a short thank-you note or send an e-mail to the host.

任务A：Mary想邀请James参加生日晚会，请将以下各项活动按正确的顺序排列，把序号填入相应的横线上。

A. Mary and James enjoy the party together.      

B. James accepts the invitation.

C. James writes a thank-you note.              

D. James brings a birthday present.

E. Mary invites her friend James to her birthday party.

.  　E　    1.____      2. ____    3.____  4 .____

任务B：请你帮James 给Mary 写一句表示感谢的话。

5.                                   .