求一篇英文作文.题目为手机是否一个该带到学校去.字数为 250-350字 左右

Nowadays,practically2 everyone has a cell phone,and most would agree they are a great convenience. Still, they are the subjects of tremendous3 controversy4. Do they cause cancer5? Do they cause car accidents?And perhaps most importantly for millions of students, should cell phones be banned at school?
　　Many students depend on cell phones to coordinate6 plans with their friends and family. Mobile phones are especially useful for obtaining rides home from after-school activities. In that context7, cell phones most definitely should be available8 for student use on school property. The question is where and when may they make calls.
　　The smartest move is to let all students keep their phones with them on campus9,but to ban cell phone use during school hours.
　　Certainly, people shouldn't be gabbing10 it up with their friends during a lecture.Cell phones are a luxury11－－ not a necessity -- for students. Class is a time and place where learning should take priority12 over everything else.Cell phones do not belong in the classroom, but that doesn't mean they shouldn't be allowed at school.
　　So what's the point of having cell phones on campus if students can't use them during school hours? The availability of convenient communication. Most schools have pay phones13 at students' disposal14 if it becomes necessary for outside contact to be made, but these phones are nowhere15 as immediate or convenient as a cell phone.
　　Letting students carry phones on campus allows them this freedom. However, whether schools do the right thing and avoid complete bans on cell phones is strictly their call.