题目内容：

英语老师通过邮件发来了今晚作业：看图作文(四幅图见附件)，完成后发电子邮件给老师。请你仔细观察下面的四幅图，写一篇60词左右的短文完成作业。短文的开头已给出，不计入总词数。

Sam is visiting the zoo with his friends Jim, Henry and Mike.

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