Today,more and more teenagers have their own mobile phones.They chat with friends,play games,listen to music by using phones.
In my opoinion,I think teenagers shouldn't bring phones to school.
Many students play phone games in class .They are not concentrate on what the teacher said.If they bring phones to school ,they'll aslo get help by phones on test.
Although mobile phones are very useful and common,I think teenagers shouldn't bring them to school.
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