It's nine o'clock at night. What are you doing? Watching TV, doing your homework, or chatting on your mobile phone? It is important for students to get a good asleep every night. If you don't sleep well at night, you cannot do your work well at school the next day. We all know that the best number of
sleeping hours for students is eight. But most students don't get enough sleep. That is bad for their schoolwork.
I read an interesting articlein a newspaper. It says young students are facing a new problem.
They may go to bed early, but a lot of them wakeup(醒来)in the middle of the night. They wake up not because of using the bathroom. They wake up because they are afraid of missing out（错过）！The article says schoolchildren wake up during the night tolook at their mobile phones. They are afraid that they maymiss something important on the mobile phone. They wake up at all times the night and go online.
I'd like to ask you to turn off your mobile phones at night. And you won't miss anything important.
