题目内容：

Cindy邀请Ann参加她本周的生日聚会，但Ann下周很忙，周一要和父母去听音乐会，周二要上钢琴课，周三要准备考试，周四要在家照顾奶奶，周五要训练网球。因此她无法前去参加生日宴会。Ann感到很抱歉，只好写辞谢信。请你为Ann给Cindy写一封e-mail。70词左右。(15分)

Dear Cindy,

Thank you very much for_________________________________________________

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Ann