英语作文：学生使用手机的利弊.

Mobiles phones have become a problem for middle schools。 In some schools the students are not allowed to carry them during school hours。 Using moblie phones gives teachers so much trouble。 The students sometimes use them to send messages or e-mails in class。 Some students even use phone messages to cheat during exams。 Therefore, some students and their parents think they can get in touch with each other by mobile phones。 They also think the students can use mobile phones to get online to study or search for information。 In fact, we can solve this problem。 The students with mobile phones can leave phones at school offices。 Or they can turn off the phones during classes。 Students can use mobile phones as long as schools let them know when they can use phones。