完形填空（每小题2分，共20分）
根据短文内容,从A、B、C、D四个选项中选出一个能正确填入相应空格的最佳答案。
In China more and more middle school students are getting       sleeping time than before. Most students sleep less than nine           every day because they have much homework to do. Some homework is given (被给) by their teachers          some by their parents. Also some students don’t know       to save time. They are not careful enough       they do their homework, so it       them a lot of time. Some students spend       time watching TV or playing computer games. They stay up very      . Some students have to get up early every morning on weekdays to get to school on time by bus or by bike. It can be a long way from their home to school.
Schools and parents should cut down some of the homework so that children can enjoy at least nine hours of        every night for their health. As we all know children are our country’s future. Their       should be well cared for.

A．shorter B．longer C．short D．long

A．minutes B．hours C．seconds D．days

A．but B．or C．and D．so

A．what B．when C．how D．who

A．when B．before C．if D．after

A．makes B．takes C．gets D．brings

A．many too B．much too C．too many D．too much

A．early B．late C．later D．lately

A．sleep B．study C．play D．TV

A．food B．health C．study D．fun