Teens’ Sleep Survey 9-10 hours’   sleep is what most teens need a night. However, the study shows as follows.
60% of teens sleep for about 7 hours at night.	21% of teens find it difficult to fall asleep.		56% of teens feel tired sometimes while 24% feel tired all the time
What may keep teens awake at night?
Tips on getting to sleep ★Exercise during the day. ★Avoid coffee before bedtime. ★Write down your worries and fears. ★Stay away from electronic devices（电子设备）. ★If you don’t fall asleep within about 20 minutes, do something relaxing. Read or listen to soft music. Go back to bed when you're tired.

【小题1】What probably causes nearly one third of teens to stay awake at night?

A．Exams.

B．Schoolwork.

C．Social media.

【小题2】Which of the following can improve your sleeping?

A．Drinking a little coffee when you’re tired.

B．Doing physical activities during the day.

C．Listening to rock music before bedtime.

【小题3】Where can you most probably read the material above?

A．In a travel guide.

B．In a science report.

C．In a teens’ magazine.