假设你是红星中学2014～2015学年高二（1）班的学生李华，上周日你班组织到首都图书馆参加一天的文化志愿活动，请根据以下四幅图的先后顺序，用英语写一篇日记，记述活动的全过程。
注意： 1．词数不少于60。
2．日记的开头已给出，不计入总词数。

March 29th，Sunday                               Fine
Today some classmates and I served at Capital Library as volunteers．
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