一篇英语作文主题：手机的利与弊,要求,不能从网上下载,结合校园谈谈手机对我们的生活带来的好处,坏处.字数-150字左右.

Mobile phones have become one of the necessities in our lives. We can hardly live without it because it's too important and useful for us. But should students be allowed to use mobile phones in school...