阅读下列短文，从各题所给的A、B、C、D四个选项中选出最佳选项。
You may know about “junk food” like French fries. But do you know about “junk sleep”? Recently, a British survey（调查）shows that there are many electronic products in teenagers’ bedrooms. They are influencing teenagers’ sleep badly.
The survey was done among 1,000 British kids from 12 to 16. It found that 50% of them got just 4 to 7 hours’ sleep every day. But doctors say they need 8 to 9 hours.
Almost 25% of the kids said they often fell asleep while they were watching TV, listening to music or using other electronic products.
“This is very worrying,” said Dr. Chris, a British professor（教授）. “We call it ‘junk sleep’. It means you don’t get enough sleep and the quality（质量）of the sleep is low, too. If you don’t get a good rest, you won’t do well in school the next day.”
The survey found that quite a few of the kids felt tired each day because of the junk sleep, especially girls between 13 and 16 feeling the worst. Nearly all the teenagers have a phone, MP5 or TV in their bedrooms. And lots of them even have all the three.
Dr. Chris suggested that parents should help their children keep away from electronic products, and teenagers should spend less time on the electronic products.
（1）What does this passage mainly talk about?
| A． |
Junk food. |
B． |
Junk sleep. |
| C． |
Electronic products. |
D． |
The importance of sleep. |
（2）How many of the children sleep only 4 to 7 hours a day in the survey?
| A． |
200. |
B． |
250. |
C． |
500. |
D． |
1000. |
（3）“Junk food” and “junk sleep” are similar to each other because ________.
| A． |
they are both low in quality |
B． |
they are both needed in our life |
| C． |
they are both enjoyed at weekends |
D． |
they are both necessary for people’s health |
（4）Which of the following is TRUE according to the passage?
| A． |
Teenagers of 12 to 16 only need 4 to 7 hours’ sleep each day. |
| B． |
Few of the teenagers have electronic products in their bedrooms. |
| C． |
Teenagers spend too much time on electronic products. |
| D． |
Girls between 13 and 16 spend the least time on electronic products. |
（5）Which of the following should be the best way to solve the problem?
| A． |
Parents must take the electronic products away from their children. |
| B． |
Parents stop the teenagers from using any electronic product. |
| C． |
Teenagers should decide not to use the electronic products. |
| D． |
Teenagers should spend less time on the electronic products. |
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