Scientists say that students usually need eight to ten hours' sleep per 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 (3) ． But not all parents are happy about this． Once a mother told us that every (4) her l0-year-old boy put up one finger with his (5) still closed， begging （恳求） for one more minute for sleep． Like thousands of young "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 （更虚弱的） than they should be． Too much (6) is not the only reason why students stay up （熬夜） late． Some students always watch TV or play computer games late at night． Scientists said students should develop good study habits．




A. enough B. little C. any D. a lot

A. sorry B. glad C. afraid D. unhappy

A. hard B. hardly C. heavily D. hurry

A. night B. noon C. afternoon D. morning

A. ears B. neck C. eyes D. hair

A. sleep B. homework C. food D. rest