作文。（50詞左右，請(qǐng)寫在下面的橫線上。）

1.手機(jī)發(fā)明于1973年

2.手機(jī)用于和別人交流（communicate with sb）

3.青少年們能不能使用手機(jī)，

4.使用手機(jī)的利與弊

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