Mobile phones have become a(1)for middle schools. Some middle schools in(2)ask students not to carry mobile phones during school hours. There are several reasons. First, mobile phones are(3). Second,using mobile phones is a distraction to the students. Third, mobile phone use also gives teachers so much trouble, because some students might use phone messages (4). So, some teachers say students should not have mobile phones at school, but if there was a good reason, they could(5)their phones at the school office.