假设你是北京市某中学高三年级的学生李华，擅长舞蹈。你报名参加了2009年国庆60周年晚上的联欢。请根据以下四幅图的先后顺序，写信给你的笔友David讲述参加活动的全过程以及你的感受。信的开头和结尾已经给出。                                  
注意：词数不少于120。                提示词：联欢get-together

Dear David,
I am writing to share the great happiness of taking part in the performance in celebration of the 60^th national anniversary.____________________________________________________________
I will enclose some pictures taken that evening.
Wish you all the best!
Yours,    
Li hua