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study C. hair D. shoes ( ) 4. A. fall B. fell C. feel D. felt ( ) 5. A. but B. if C. and D. so ( ) 6. A. shorter B. longer C. smaller D. farther ( ) 7. A. school B. hospital C. store D. factory ( ) 8. A. leave B. e C. go back D. live ( B) How much sleep do we need? We are all different. Some people need only three hours of sleep a night. 9 need ten hours of sleep a night. After age fifty, the average(平均) sleep time goes 10 to hours a night. Most of people have a night when they can’t sleep. About one in three Americans has a problem with 11 . Many of these of people 12 fall sleep. This is not 13 problem. Many famous people 14 could not fall asleep. Some of these people had their own ideas to make them sleep. Benjamin Franklin, the famous statesman and inventor had four 15 . He 16 from one to the other to fall asleep. King Lois XIV of France has 413 beds and hoped to fall asleep in one of them. Mark Twain, the famous American writer, had a different way. He lay on his side across the end of the bed! ( ) 9. A. Another B. The other C. Others D. The others ( ) 10. A. up B. out C. in D. down ( ) 11. A. work B. sleep C. thei