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 ___小题1:___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__小题2:__. They are not careful enough while they do their homework, so it takes them a lot of time. Some students ___小题3:___too much time watching TV programmes or playing computer games. They stay up(熬夜) very late. Some students have to get up __小题4:___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 ___小题5:__their health. As we all know, children are our country's future. They should be well cared for.
小题1:because
小题2:time
小题3:spend
小题4:early
小题5:for
题目分析：
小题1:此题考查连词表示原因，学生睡眠时间少于9个小时的主要原因就是太多的家庭作业，故选because。
小题2:此题考查名词，根据下文的内容提示可知学生们不知道怎样节省时间，故选time。
小题3:此题考查固定句型结构spend some time in doing sth表示花费时间做某事，故用spend。
小题4:此题考查副词，学生要早早起床，故用early。
小题5:此题考查介词，表示为…故用for。
点评：要注意对语句的正确理解。才能对所缺的单词有个正确的推断。