Experts say that students usually need eight to ten hours'sleep，but most Chinese students do not get enough sleep．Some Chinese parents are usually glad 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 morning her 9-year-old girl asked for one more minute to sleep．She really didn't want to get up．In China，many students are like early birds．They have to get up before six every morning．

A report shows that without a good night's sleep，students seem to be weaker than they should be．They don't want to do anything and don't study as well as before．Some students fall asleep during classes．Some get ill easily．Too much homework is not the only reason．Some watch TV or play computer games late into the night and can't get up the next morning．

Experts have ever said that the students should develop good study habits．Staying up late doesn't mean working hard．It may be bad for our health．Some clever students never study late so that they are able to work well in class．

56．Why did the 9-year-old girl ask for one more minute to sleep？___

A．Because she didn't have enough sleep．

B．Because it was not time for her to get up．

C．Because she didn't want to go to school．

D．Because she wanted her mother to wake her up．

57．What may happen if students don't get enough sleep？___

A．They become too weak to sleep．

B．They may not work well in classes．

C．They will go to bed early．

D．They will be weak in English．

58．The underlined words"early birds"in Paragraph 1are the persons who___．

A．get up early

B．get up late

C．go to bed late

D．go to bed early

59．Which of the following is the WRONG reason why students stay up late？___

A．They have too much homework to do．

B．They watch football matches late．