Nowadays no matter where we are，we can see many adults and children playing with their mobile phones.This can happen at a bus stop，in a restaurant or at a supermarket.Why is that?

We've probably got two reasons.The first reason is supposed to be that people are trying to make good use of time.And the second one may be that people show little interest in what's happening around them.However，focusing only on what's on our mobile phones may not only do harm to our eyesight，but also prevent us from communicating normally.

Therefore，some other ways to kill time are strongly suggested.For me，chatting with others is a good replacement of playing always with mobile phones.

名师点评：本文是一篇提纲作文，要点齐全，语言简练，有以下亮点：

1．高级词汇，如：make good use of，do harm to，focus on，prevent...from doing等的运用十分恰当。

2．开头让步状语从句的使用，动名词作主语的运用使文章句子显得灵活多变。

3．However，not only...but also，therefore等关联词的运用使文章前后衔接自然。