《2025年同步练习册山东科学技术出版社九年级英语全一册人教版》

B
March 21 is World Sleep Day. How’s your sleep recently?
Some researchers asked 8, 200 people about their sleep. More than 36. 3 percent of them said they often sleep badly. The study also finds that many students have only 5 hours of sleep a day because they have bad sleeping habits. According to the US National Sleep Foundation, teenagers need 8. 5 to 9 hours of sleep every night.
What cuts into their sleeping time? Homework. Also, school starts early in the morning. But bad sleeping habits also play a role.
Do you like to have a look at your mobile phone before going to bed? The survey finds that 60 percent of people check their phones before they sleep. They read news, watch videos, chat with their friends or read books on the Internet.
It’s important for us to get enough sleep. If we can’t get enough sleep, we’ll feel sleepy and think slowly. And sleepy kids are often unhappy, says a study by the US National Sleep Foundation.
We can’t change our school time. But there are still ways to get better sleep. Stay away from soda, coffee and tea at night since they make it hard to sleep well. Leave your mobile phone and computer on your desk. Watch less TV.
Look at these numbers in the box. They are glycemic indexes(血糖生成指数). The bigger the number is, the better that food can help you to get better sleep.
 103 |Dates(枣) 
 70  Mashed potatoes 
 56  Boiled potatoes 
 52  Orange juice 
 49  Chocolate bar 
 30  Whole milk 
6. How many hours of sleep do teenagers need every night according to the passage?
A. About 12 hours.
B. About 9 hours.
C. About 4 hours.
D. About 5 hours.
(B)
7. Many students can’t get enough sleep because they ____.
A. play sports too much and feel tired
B. use mobile phones during the daytime
C. drink too much soda, coffee and tea at night
D. have bad sleeping habits
(D)
8. When people can’t get enough sleep, they may ____.
A. feel sleepy and unhappy
B. go to bed earlier next day
C. change their school time
D. go to work late next day
(A)
9. In the passage if you want to get better sleep, you should ____.
A. chat with your friends
B. eat the right food
C. put your phone beside you
D. stay away from food like dates
(B)

答案： 6.B 7.D 8.A 9.B