题目内容：

请写一篇120词左右的英语短文，分析越来越多的中学生玩微博的原因和利弊。

注意  1）开头和结尾已给，不计入总词数    2）书写清楚,卷面整洁

Micro blogs have become part of our lives and bring lots of benefits. …

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In my opinion，we should be careful and cautious while using micro blogs.