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Later School Start Helps Kids Get Zzz Te...

    Later School Start Helps Kids Get Zzz

Teenagers have been sleeping less. This is an issue all across the United States. Research from Harvard Medical School shows that having less sleep can make teens fat and cause some developmental problems. Because of the increasing use of devices like smartphones and computers, students today are staying up late. Many teens use them long after dark. “At night, I am on my phone and I just want to stay up. I often wake up so tired that I wish I could go back to sleep,” Hazel Ostrowski, a high school student, said.

To make matters worse, 93% of high schools and 83% of middle schools in the U.S. start before 8:30 a. m. That time goes against official health advice from American Academy of Pediatrics (美国儿科学会). Schools do not want late start times, because it will cause traffic problems. Parents also want older kids to come home early to watch younger kids in the afternoons.

But some studies suggest that students between the ages of 11 and 17 get enough sleep on school nights. Therefore, some researchers suggest starting school late.

Researchers are studying later school start times in Seattle, Washington. The Seattle School District () made a big time change in the fall of 2016. The change was for high schools and most middle schools. Before, the first bell rang at 7:50 a. m. After the change, classes began at 8:45 a. m.

The researchers worked with science teachers at two high schools in Seattle, and 178 teenagers took part in the study. They wore activity monitors to discover whether a later start to the school day would help them get more sleep. The researchers compared sleep habits (习惯) of these teens in spring 2016before the change, to sleep habits of them from spring 2017, after later start times began.

What changed was wake-up time. Morning wake-up time changed from 6:24 a. m. to 7:08 a. m. Falling asleep changed only a bit. It went from 11 :27p. m. to 11:38 p. m.

Researchers noticed that there were fewer late students after the changes. The study also found the students got about 34 more minutes of sleep each night. Students also felt less sleepy in the daytime. Their grades improved as well. It seems a later start to school is helping students.

1.In the first paragraph, the writer gives the example of Hazel to show________.

A.students wake up tired from sleeping too long

B.students want to stay up late to have a good time

C.students become much fatter for taking less exercise

D.students sleep less because of using smartphones long

2.According to the study, the Seattle School District ________.

A.starts school at 8:30 in the morning B.starts school 55 minutes later than usual

C.asks students to change their sleeping habits D.asks parents to make sure their kids go to bed early

3.What is the last paragraph mainly about?

A.Reasons for later school start. B.Advantages of later school start.

C.Causes of less sleep in students. D.Solutions to the problem of sleeping less.

 

1.D 2.B 3.B 【解析】 本文是一篇说明文,介绍了美国某些地区推迟学校早晨的上课时间,为了让青少年有更多的睡眠时间,效果显著。 1.细节理解题。根据例子之前的“Because of the increasing use of devices like smartphones and computers,students today are staying up late. Many teens use them long after dark”,可知此处举例是为了说明学生们因为使用手机所以睡眠时间更少了,故选D。 2.细节理解题。根据“The Seattle School District made a big time change in the fall of 2016…Before, the first bell rang at 7:50 a. m. After the change, classes began at 8:45 a. m.”,可知西雅图早晨上课时间由之前的早上七点五十推迟到了早上八点四十五,比以往推迟了55分钟,故选B。 3.段落主旨题。通读整段,可知该段主要介绍了学校早晨推迟上学的好处,包括“迟到的学生变少了,学生睡眠时间延长了,学生成绩改善了”,故选B。
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