Scientist said that students usually need eight to ten hours' sleep per night. But most Chinese students do not get 1sleep. Some Chinese parents are usually2to see their children studying late. They will think their children work very3. But not all parents are happy about this. Once a mother told us that every4her 10-year-old boy put up one finger with his5still closed, begging(恳求）for one more minute to sleep. Like thousands of students "Early Birds" in China, he has to get up around six every morning.
A report shows that without a good night's sleep, students will be weaker(虚弱的）than they should be. Too much6is not the only reason why students stay up(熬夜）late. Some students always watch TV or play computer games late into the night.
Scientist said students should develop good study habits.
