阅读下面短文，在短文的空格内填入适当的词，使其内容通顺。（每空一词）
（本题共5小题；每小题2分，满分10分）
In China, more and more middle school students are getting shorter sleeping time than before. Most students sleep less than nine hours every night ______they have much homework to do. Some homework is given by their teachers, and some by their parents. Also, some students don't know how to save____. They are not careful enough while they do their homework, so it takes them a lot of time. Some students ______too much time watching TV programmes or playing computer games.  They stay up(熬夜) very late. Some students have to get up _____every morning on weekdays to get to school on time by bus or bike. It can be a long way from home to school.
Schools and parents should cut down some of the homework so that the children can enjoy more than nine hours of sleep every night _____their health. As we all know, children are our country's future. They should be well cared for.