It is reported that many middle school students are just not getting enough sleep, especially during the school weekThe problem seems to get worse as they get olderGrade 7 students sleep 84 hours a school night, and Grade 9 students only 69 hours

3It’s also reported that not getting enough sleep can cause problems in a student’s lifeMany students fall asleep in school or while doing their homework, so it is not surprising that they get lower grades than those who get enough sleep

Scientists suggest nine hours a night for middle school studentsOf the students who feel unhappy and nervous, 73% don’t get enough sleep at nightWhy aren’t students getting enough sleep? Many students have one of the following things, like telephone, television, or computer in their bedroomsUsing them on a school night not only takes their time away from homework, but also makes it difficult for them to fall asleep.(4As a result, many students can't fall asleep before 11 pm, yet they must get up early to go to school the next day

    Scientists also suggest students should not do exciting activities for an hour before bedtime

(一)根据短文内容简要回答问题。

1 How many hours of sleep do middle school students need each night according to the scientists?

                                                                      

2What shouldn’t students do before bedtime?

                                                                      

(二)将短文中划线的句子译成汉语。

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(三)请给短文拟一个适当的标题。

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