You may know about “ junk food” like French fries. But do you know about “junk sleep”?  Recently, a British survey found that electronic(电子) products in teenagers bedrooms are affecting(影响)their sleep.

  The survey was done among 1,000 British kids from 12 to 16. It found that percent of them got just 4 to 7 hours sleep every day. But doctors say they need 8 to 9 hours.

  Almost a quarter of the kids said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.

“This is very worrying.” Said Dr Chris Idzikowski, a British expert, “We call it ‘junk sleep’, It means you don’t get enough sleep and the quality of the sleep is bad, too. If you don’t get good rest, you don’t perform well in school the next day.”

The survey found that 40 percent of the kids felt tired each day, with girls between 13 and 16 feeling the worst. Nearly all the teenagers have a phone, Mp4 or TV IN THEIR BEDROOM. And many of them have all three.

51. This passage is mainly about______.

A. junk food        B. junk sleep

C. electronic products    D. the importance of sleep

52. _______of the children in the survey sleep only 4 to 7 hours a day.

A. 200          B. 300

C. 500          D. 1,000

53. “Junk food” and “junk sleep”are similar to each other in the way that_______.

A. they are both low in quality          B. they are both produced in factories

C. people enjoy both in their spare time      D. they are both good to people’s health

54. Which of the following is TRUE according to the passage?

A. Teenagers need 4 to 7 hours of sleep each day.        

B. Few of the teenagers have a phone in their bedrooms.

C. Teenagers spend too much time on electronic products.

D. Girls between 15 and 16 spend the least time on electronic products.

55. Which of the following is the best solution to the problem?

A. Parents watch TV together with their children         

B. Forbid teenagers to use any electronic product.

C. Teenagers limit (限制) their use of the electronic products.        

D. The use of mobile phone and Mp4 is not allowed at school

A teacher stood in front of his history class of twenty students just before handing out the final exam. His students sat quietly and waited for him to speak.

“It’s been a pleasure teaching you this term,” he said. “You’ve all worked very hard, so I have a pleasant surprise for you. Everyone who chooses not to take the final exam will get a ‘B’ for the course.”

Most of the students jumped out of their seats. They thanked the teacher happily, and walked out of the classroom. Only a few students stayed. The teacher looked at them. “This is your last chance,” he said. “Does anyone else want to leave?” All the students there stayed in their seats and took out their pencils.

The teacher smiled. “Congratulations (祝贺),” he said. “I’m glad to see you believe in yourselves. You all get A’s.”

51. This story most probably took place    .

A. at the beginning of the term        B. in the middle of the term

C. at the end of the term            D. at the beginning of the school year

52. Most of the students got Grade ______.

A. ‘A’           B. ‘B’          C. ‘C’          D. ‘F’

53. Why did some students stay in their seats?

A. Because they wanted to take the exam.

B. Because the teacher told them to stay in their class.

C. Because they were afraid to leave.

D. Because they didn’t have anything to do.

54. The teacher gave the students who stayed in the classroom A’s because ______.

A. the teacher liked them

B. they were cleverer than the other students

C. they believed in themselves

D. they studied hard

55. The underlined word “them” in Paragraph 3 refers to “______”.

A. students staying in their seats   B. students leaving the classroom

C. their seats                  D. all the students

         

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