In China，more and more middle school students are getting 56 sleeping time than before．Most students sleep less than nine hours every night, because they have much homework to do．Some homework 57 by their teachers，and some by their parents. Also, some students don’t know 58 to save time．They are not 59 enough while they do their homework, so it 60 them a lot of time．Some students spend too much time 61 TV or playing computer games．They stay up very late．Some students have to get up early every morning 62 weekdays to get to school on time by bus or by bike． It can be a long way from home to school． Schools and parents should cut down some of the homework 63 our children can enjoy more than nine 64 sleep every night for their health．For children, we should make best use of our time. When we have enough time for sleeping，we will find 65 much better for both our study and health. (    )小题1:A．that        B．this         C．It