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d, then hit the snooze button on their mobile phones twice for an 11 minutes’ rest, in order to make their bodies feel like they have had more sleep. Professor Stevie Williams said, “ Setting your alarm clock much earlier and continually pressing the snooze button actually makes you feel even weaker after a night’ s sleep. Napping in this way can make you miss out on the important REM sleep, which happens just before you wake up. And it is necessary for you to use the weekend to catch up on the sleep debt during the week.” A third of adults are kept awake at night because of money worries, a quarter can’ t fall asleep due to family problems, and just under onefifth worry about work stresses. Being short of sleep is extremely harmful to a person’ s heath and wellbeing. But we have to stop treating sleep as a luxury (奢侈品 ), and realize that it is necessary to get eight hours of sleep every night. 44. What can we know about REM sleep? A. We should avoid it before we wake up each day. B. It happens before we wake up and is good for our health. C. It’ s useless to enjoy this stage of sleep before we wake up. D. It can do harm to our health as it makes us wake up earlier. 45. What’ s the author’ s purpose in writing the last paragraph? A. To show what keeps us awake. B. To tell us why we need to treat sleep seriously. C. To give us some tips on how to get a sound sleep. D. To offer some evidence that sleep is a kind of luxury. 46. The author writes the passage in order to tell us that we should . A. avoid working late into the night B. get enough sleep and know its importance C. try to keep a balance between family and work D. replace the unhealthy lifestyle with a healthy one 47. Which of the following can be the best title of the passage? A. What an eighthour sleep means B. Why people need to sleep every day C. How to get a sound sleep D. Enough sleep is very important\ D Linda Evans was my best friend— like the sister I never had. We did everything together: piano lessons, movies, swimming, horseback riding. When I was 13, my family moved away. Linda and I kept in touch through letters, and we saw each other on special time— like my wedding (婚禮 ) and Linda’ s. Soon we were busy with children and moving to new homes, and we wrote less often. One day a card that I sent came back, stamped “ Address (地址 ) Unknown. ” I had no idea how to find Linda. Over the years, I missed Linda very much. I wanted to share (分享 ) happiness of my children and then grandchildren. And I needed to share my sadness when my brother and then mother died. There was an empty place in my heart that only a friend like Linda could fill. One day I was reading a newspaper when I noticed a photo of a young woman who looked very much like Linda and whose last name was Wagman — Linda’ s married name. “ There must be thousands of Wagmans,” I thought, but J still wrote to her. She called as soon as she got my letter. “ Mrs Tobin!” she said excitedly, “ Linda Evans Wagman is my mother. ” Minutes later I heard a voice that I knew very much, even after 40 years, laughed and cried and caught up on each other’ s lives. Now the empty place in my heart is filled. And there’s one thing that Linda and I know for sure: We won’ t lose each other again! 48. The writer went to piano lessons with Linda Evans _______. A. at the age of 13 B. before she got married C. after they moved to new homes D. before the writer’ s family moved away 49. They didn’ t often write to each other because they _______. A. got married B. had little time to do so C. didn’ t like writing letters D. could see each other on special time 50. There was an empty place in the writer’ s heart because s