在生活、工作和学习中，大家都经常看到作文的'身影吧，作文可分为小学作文、中学作文、大学作文（论文）。如何写一篇有思想、有文采的作文呢？以下是小编收集整理的四级作文：社交在线网络，欢迎阅读与收藏。
Social Network Sites
Social network websites have rapidly increased in popularity over the past few years. Many people have registered and become members of some social network websites，such as Facebook，Kaixin and Twitter. These websites have become a part of their daily life.
People’s opinions vary greatly on social network sites. Supporters regard social network websites as places to share feelings and experiences with their friends. Besides，they say these websites provide various interesting games and can help people relax. However，opponents think it is difficult to protect users’ privacy on social network sites. Apart from that，they maintain that users’ chances to gain employment may be reduced as more and more employers take the images which users portray on social network sites into consideration.
As far as I’m concerned，social network sites serve as a good platform for us to make new friends and keep in touch with old ones. Still，we should be aware of the potential dangers involved. It is very necessary to adjust our privacy settings to control who has access to our personal information.
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