选择题：Social Network Sites Directions: For this part, yo

题目内容：
Social Network Sites Directions: For this part, you are allowed 30 minutes to write a short essay entitled Social Network Sites. You should write at least 150 words following the outline given below. 1. 当今社会，社交网站很流行2. 各人对此看法不同3. 我的看法
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