As we know,a mobile phone is more and more popular in our daily life .Some people think it is good ,but others don't .
A mobile phone helps us a lot .It let us make a phone call immediately when we want. We can also use it to listen to music and read the news. They are advantages of a mobile phone. But it also have disadvantages. Students always spend much time in playing games. They even use it for copying nswers while having tests.
A mobile phone is useful or not depends on our behavior
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