题目是让你给校长写封信，介绍你自己还有你想知道关于这个学校的一些事情，希望可以得到校长的帮助(写一

Dear Mr. President: Hello, I am writing this letter to you of the reasons for yes. Recently, more and more school students to use their phones and put it to the classroom. Class can always hear the beep that affected the students will also disrupt the attention of the teacher teaching ideas and the examination of students in the United States has become a tool for cheating so I think schools should take some measures in the study and the time for the start-up mobile phone ban We learn to create a good learning environment