Why is that many teenagers have energy to play computer games until late at night, but can't find the energy to get out of bed in time for school? According to a new report, today's teenagers are getting so little sleep but their health is in danger.

This raises serious questions about whether being short of sleep is influencing children's ability to pay attention at school. Research has shown that losing even just half an hour's sleep at night can have deep influences on how children perform the next day.

So why aren't teenagers getting enough sleep?Some experts suggest that televisions, computers and mobile phones in children's bedrooms may cause problems.Instead of reading a book at bedtime,children are playing computer games,surfing the web,sending messages, or watching television.As these new pre-sleep activities have become more common,more traditional ones such as reading have become less,Dr.Luci Wiggs,a researcher at Oxford

University's Section of Child and Adolescent Psychiatry said,“One of the problems with these pre-sleep activities is that they do not have clear start and end times which leads to being short of sleep.”

Research has shown that teenagers have different sleep patterns from adults.Human bodies produce melatonin(褪黑激素)to help fall asleep. Most adults start to produce melatonin at

about 10 pm,while teenagers only begin to produce it three hours later.It is possible that this delay in melatonin production is caused by the behaviors of teenagers such as playing with phones late at night.

Problems about sleep- who needs how much and when -are usually connected to students' achievements. But modern brain researchers say it is time that more schools wake up to both biological and social facts and make a better timetable for their teenager students.

1.What can we learn from Paragraph 2?

A.It's very common for teenagers to have less sleep.

B.It doesn't matter if children sleep half an hour less.

C.Being short of sleep has influence on children.

D.A good night sleep at weekends helps children study well.

2.According to Dr.Luci Wiggs,.

A.too many pre-sleep activities take up teenagers' sleeping time.

B.playing computer games before bedtimes does harm to health.

C.fewer and fewer children read books at bedtime today.

D.teenagers shouldn't watch TV before they go to sleep.

3.What does the underlined word 'delay' mean?

A.Rushing. B.Changing. C.Putting off. D.Cutting off.

4.What can we infer from Paragraphs 4 and 5?

A.Schools need to offer more biology classes.

B.Teenagers may be kept awake by themselves.

C.Melatonin influences teenagers' achievements.

D.It's necessary for schools to start classes later.

5.Which can be the best title for this passage?

A.Wake Up Sleeping Teenagers

B.Let Sleeping Teenagers Lie

C.Keep Away From Electronic Products

D.How to Sleep

Spiders, bats, black cats and more…. Let’s see what Halloween has in store!

Halloween Party

Sunday. Oct, 26 8:00 am-10:00 pm

Food & Drink 587 Rose Road

Please reply to Ted, Steve and Brown at 211-8389

Costumes and children are welcome!

A new app—Shai Shufang

★Help sort your books in different classes.

★Share book lists with your friends.

Let you know what books are popular right now.

You can add any new book into your shopping list.

Please click http://www.Shaishufang.com to download the app.

Lost Dog! Please Help!

Name: Cookie Age: 6 weeks old

Hair: Brown Eye color: Black

Boy/Girl: Girl Location: 259 Tongshi Road

Lost around 8 am on June 5, 2017

REWARD(报酬): $300

Please contact with any information: Julia: 987-8647 Lisa: 984-6364

Notice

There will be a meeting on Chinese Traditional Culture

by Professor Wang Dong from Beijing University.

In the fifth building Classroom 906.

On June 16, 2017, at 9:00 am.

The Chinese Language Department, Yanti University June 13.2017

根据短文内容,选择最佳选项,并在答题卡上将选定答案的字母标号涂黑。

1.The Halloween party will be held _____.

A.on June 5 at 587 Tongshi Road

B.on October 26 in the fifth building

C.on October 26 at 587 Rose Road

D.on June 16 at 259 Tongshi Road

2.If Jack downloads the ShaiShufang app, he can _____.

A.know the popular books immediately

B.see what Halloween has in store

C.contact some information with Julia

D.take part in the meeting about culture

3.The dog Cookie _____.

A.was lost 6 weeks ago B.has brown eyes

C.has black hair D.is a girl

4.The meeting held by Professor Wang Dong is on ______.

A.a new app-Shai Shufang B.Chinese Traditional Culture

C.foreign Language Research D.Chinese Traditional Language

5.From the passage, we can know _____.

A.the Halloween Party will last for 16 hours

B.app users can only add popular books into his or her shopping list

C.the person who finds the lost dog will be rewarded $300

D.professor Wang Dong is from Yantai University

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