题目内容

—What did you do this Dragon Boat Festival?

—Not much. But I’ve heard that people watched the Dragon boat races and of them were men.

A.million of; three quarters B.three millions; third quarter

C.millions of; three quarters D.three million; third quarter

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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

Do you have friends or relatives who live in other parts of China? For example, maybe you live in Beijing, but you have cousins in Chongqing. But luckily, if you want to call them on the phone or do a video chat with them, you don’t have to worry about which time zone you are in. This is because almost all of China follows a single standard time.

But some countries have many different time zones. For example, the US alone has five different time zones. My hometown New York is in the Eastern Time Zone. But my friends in California are in the Pacific Time Zone, which is three hours behind my time zone. So, if I want to call them, I have to plan with them ahead of time to make sure we are both free at the same time.

Actually, there is one exception (例外) in China: the Xinjiang Uygur autonomous region (新疆维吾尔自治区). In this region, people either follow Beijing Time - the time that the rest of the country follows - or Xinjiang Time, which is about two hours behind Beijing Time. People in Xinjiang have to be clear whether they are using Xinjiang Time or Beijing Time when making plans with each other.

For the first year I lived in China, I would often get phone calls from my mother very late at night because she forgot to consider the time difference. My hometown is exactly 12 hours behind China time! But by now, my family, friends and I have gotten used to the difference.

1.There are ________ time zone(s) in America.

A.one B.two C.five

2.The writer has to make a plan with friends in California before calling because ________.

A.they are both free

B.they are at the same time

C.they are in different time zones

3.The underlined word “consider” means ________.

A.认为 B.关心 C.考虑

4.Which of the following is TRUE?

A.All of China follows a single standard time.

B.People in Xinjiang can choose the time they use.

C.It is 10:00 in New York when it is 12:00 in California.

5.The best title for this passage is ________.

A.Learn to Save Time

B.Make Plans before Calling

C.Different Countries, Different Times

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