题型：语法填空（语篇） 题类：常考题 难易度：困难
人教版（新课程标准）高中英语必修5 Unit 1同步练习二
It is reported that many middle school students are just not getting enough sleep, especially during the school week. The problem seems to get (bad) as they get older. Year 7 students sleep 8.4 hours in a school night, and Year 9 students only 6.9 hours.
It's also reported that not getting enough sleep can cause (problem) in a student's life. Many students fall (sleep) in school or while doing their homework, so it is not (surprise) that they get lower grades than those who get enough sleep. Scientists suggest nine hours a night for middle school students. Of the students who feel (happy) and nervous, 73% don't get enough sleep at night.
Why aren't students getting enough sleep? Many students have one of the (follow) things, like telephone, television, or computer in their bedrooms. (use) them on a school night not only takes their time away from homework, but also makes difficult for them to sleep. As a result, many students can't sleep before 11 p. m., yet they must get up early (go) to school.
Scientists also suggest students should not do exciting activities for an hour bedtime.
试题篮
