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　　Experts say students usually need eight to ten hours' sleep at night. But most Chinese students do not get (1) sleep. Some Chinese parents are usually (2) to see their children studying late. They will think their children work very hard. But not all parents are happy about this. Once a mother told us that every (3) her 10-year-old boy put up one finger with his (4) still closed, begging for one more minute to sleep. Like thousands of students "early birds" in China, be has to (5) before six every morning.

　　A report shows that without a good night's sleep, students seem to be (6) than they should be. Many students have fallen asleep during class at one time or another. Too much (7) is not the only reason why students stay up late. Some watch TV or play the computer games late (8) the night.

　　Experts have ever said that students should (9) good study habit. So some clever students (10) study late, they are able to work well in class.

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