it's necessary for a st_150字

　　Although I haven't got a mobile phone myself, I think it's necessary for a

　　student to use a mobile phone. Students use their mobile phones mostly for

　　communicating with each other. In my opinion, its a must for students to mobile

　　phones. First, it's very helpful when you are in danger, you can call 110 for

　　help or ask others for help by phone. Second, when you are in a school where far

　　away from your home, but you miss your parents very much, you can use mobile

　　phone to call them. It's very convenient. In brief, it's necessary for a student

　　to use a mobile phone.