班级：L3-C 姓名：Olivia 学号：20193001401
日期：2020/4/16 作业序号（Writing Assignment No.）：33
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题目: Some people believe that there are many dangers associated with teenager use of cell phones because of the potential for bulling or abuse. Others say that cell phones have greatly improved teenagers’ lives.
With the development of the times, mobile phones are convenient and fast communication tools, which can be seen in the street. Of course, there are also some junior high school students. With the increasing popularity of mobile phones, mobile phones have entered the campus which is closely related to us. In each class, there are many teenagers who have mobile phones.
Using mobile phones may bring many dangers to teenagers. They may use mobile phones unreasonably, such as chatting with friends, affecting rest. Second, it will encourage teenagers to compete. Every spare time or after school, some students will gather together to "compete" with each other on the style and function of their hands. There are more and more mobile phones on campus, and the grade is higher and higher. It is easy to cause psychological imbalance for those students who do not have mobile phones. Third, mobile phones provide conditions for cheating in examinations. Cheating with mobile phones is a public secret, and a piece of information can be sent to several students, cheating a wide range.
But the rational use of mobile phones can greatly change the lives of teenagers. First of all, the alarm device in the mobile phone can be used at any time. Second, when students go out to play or encounter danger in other places, they can ask parents, teachers or police for help in time. Finally, mobile phones can easily access a lot of information, broaden their horizons.
In a word, the advantages of rational use of mobile phones outweigh the disadvantages. We should learn how to use mobile phones rationally, consciously and autonomously, so as to make life more exciting.（278words）
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