书面表达（满分25分）
北京市将举办主题为“Protecting Mother Earth”的中学生英语作文比赛，你准备根据下列四幅图写一篇“Story of a Tree”的英语小故事参赛。
注意：1.词数：100左右；
2.开头已为你写好。
Story of a Tree
Once there was a family living in a cabin（小屋） under a huge tree.
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