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(B) How much sleep do we need? We are all different. Some people need only three hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average ( 平均 ) of seven to eight hours a night. After the age of fifty, the average sleep time goes down to 6.5 hours a day. Most people have a night when they cannot sleep. About one in three(1/3) Americans has a problem with sleep. Many of these people can not fall asleep. The name of this problem is insomnia. This is not a new problem. Many famous people in history had insomnia. Some of these people had special ideas to make them sleep. Benjamin Franklin, a famous statesman ( 政治家 ) and inventor, had four beds. He moved from one to another to fall asleep. King Louis XIV of France had 413 beds and hoped to fall asleep in one of them. Mark Twain, a famous American writer, had a different way. He lay on his side across the end of the bed! ( )31. People’s sleeping time at night is ________________. A. three hours B. ten hours C. not the same D. not different ( )32. In America, when people are more than fifty, they often sleep ________ hours a night. A. a lot more B. seven to eight C. only three D. about six and a half ( )33. When Benjamin Franklin couldn’t fall asleep, he _______________. A. went to sleep in another bed B. made another bed C. moved the bed to another room D. slept on the floor ( )34. When he had sleeping problems, _______________ slept at the other end of the bed. A. Benjamin Franklin B. Louis XIV C. Mark Twain D. Thomas Edison ( )35 A. Benjamin Franklin B. Louis XIV C. Mark Twain D. None of them . The word “ insomnia ” means _______________ in Chinese. A. 失明 B. 失眠 C. 失语 D. 失聪 (责任编辑：admin) |