Everybody knows how important it is for students to get a good night’s sleep every night. Most experts agree that teenagers need to get 8 hours of sleep a night. However, I know that most of you get much less sleep than that.

I read an interesting article in a teachers’ magazine recently. They did a study of 848 students in Wales. Worryingly, the results showed that teenagers are facing a new problem. They may go to bed and get up at appropriate (恰当的) times but a growing number are waking up in the middle of the night not to use the bathroom or have a snack but because of a new phenomenon: FOMO-fear of missing out!

According to the article, schoolchildren are suffering because of a growing trend to wake up during the night to check social media. Afraid of missing a comment or chance to take part in a chat, teenagers are waking at all times of the night, going online.All this happens when they should be sound asleep.

The study shows that students who use social media during the night are more likely to suffer from sadness and anxiety. Experts are worried about this growing trend and the report shows some worrying statistics (数据) that I’d like to share with you.

23% of 12 to 15-year-olds wake up nearly every night to use social media. Another 15% wake up at night once a week for the same reason. One in three students are tired all the time.

So I’d like to ask you to be responsible when it comes to social media. Be brave! Switch off your mobile phones at night. The world won’t end and your social media will be waiting to greet you in the morning! I give you my word that you won’t have missed anything important.

【小题1】Why do many teenagers get less sleep than they need?

A．They have been used to staying up late.

B．They use social media during the night

C．They have no choice but to get up early.

D．They eat snacks in the middle of the night

【小题2】Who are more likely to have bad feelings according to paragraph 4?

A．Teenagers who get enough sleep.

B．Experts who did the study in Wales.

C．Teachers who write articles for a magazine.

D．Students who check social media during the night.

【小题3】How many teenagers feel always tired because of less sleep?

A．23%.

B．15%.

C．One third.

D．Half.

【小题4】Which of the following is TRUE according to the passage?

A．All the experts agree that teenagers need to get 8 hours of sleep a night.

B．More and more teenagers are waking up to use social media in the middle of the night.

C．If the teenagers don’t use social media at night, they will miss something important.

D．It is not appropriate for teenagers to eat snacks at night.

【小题5】What is the writer’s advice to students?

A．Go to bed and get up early.	B．Be online during the night.
C．Say no to social media bravely.	D．Shut off mobile phones at night.