as the mobile phone becomes more and more popular,many people have it.i also have one.i usually use it to call to my parents and friends.it's very convenient to contact with others by the mobile phone.as far as i'm concerned,if students can use the mobile phone through a right way,it's not bad for them to have a mobile phone.百分百原创
还有这样的要求 去在线翻译,然后自己改一下
忐忑~暑假作业本上的吧。