Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses(脉搏)went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.
1.During REM sleep, a person’s breathing and heartbeat ________.
A.stop B.increase C.decrease D.stay the same
2.Which word in paragraph(段落)3 means “colorful and lively”?
A.easier B.empty C.vivid D.quickly
3.Which paragraph tells what happens when people don’t get enough sleep?
A.1 B.2 C.3 D.4
4.What is the main idea of the article?
A.REM sleep helps the brain grow.
B.REM sleep has been watched and recorded by scientists.
C.REM sleep is a time to empty the day’s garbage.
D.REM sleep is an active time when the body is hard at work.
5.You can decide from the article that REM sleep ________.
A.has a restful effect on people
B.can be avoided with lots of sleep
C.is something that all people experience
D.is something that all scientists agree on
八年级英语阅读理解中等难度题
Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses(脉搏)went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.
1.During REM sleep, a person’s breathing and heartbeat ________.
A.stop B.increase C.decrease D.stay the same
2.Which word in paragraph(段落)3 means “colorful and lively”?
A.easier B.empty C.vivid D.quickly
3.Which paragraph tells what happens when people don’t get enough sleep?
A.1 B.2 C.3 D.4
4.What is the main idea of the article?
A.REM sleep helps the brain grow.
B.REM sleep has been watched and recorded by scientists.
C.REM sleep is a time to empty the day’s garbage.
D.REM sleep is an active time when the body is hard at work.
5.You can decide from the article that REM sleep ________.
A.has a restful effect on people
B.can be avoided with lots of sleep
C.is something that all people experience
D.is something that all scientists agree on
八年级英语阅读理解中等难度题查看答案及解析
You may know about “junk food” like hamburgers. But do you know about “junk sleep” ?
A British survey found that electronic products(电子产品) in teenagers' bedrooms are affecting(影响) their sleep.
The survey was among(在……之间) 1,000 British children between 12 and 16. It found that 30% of them got just 4 to 7 hours of sleep every day. But doctors say they need 8 to 9 hours.
Almost 25% of the kids said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.
“This is very worrying,” said Dr.Chris Idzikowski, a British expert. “We call it ‘junk sleep’. It means you don't get enough sleep and the quality(质量) of the sleep is bad, too. If you don't get a good rest, you won't perform well in school the next day.”
The survey found that 40% of the kids felt tired each day, with girls between 13 and 16 feeling the worst. Nearly all the teenagers have a phone, an MP4 or a TV in their bedrooms. And many of them have all three.
1.This passage is mainly about ________.
A.junk food B.junk sleep
C.the importance of sleep D.electronic products
2.________ of the children in the survey sleep only 4 to 7 hours a day.
A.200 B.300 C.500 D.1,000
3.“Junk sleep” means ________.
A.people don't have enough sleep B.the quality of the sleep is good
C.people don't like sleeping D.people have enough sleep
4.Which of the following is TRUE according to the passage?
A.Teenagers need 4 to 7 hours of sleep each day.
B.Few teenagers have a phone in their bedrooms.
C.Teenagers spend too much time on electronic products.
D.Girls between 15 and 16 spend the least time on electronic products.
八年级英语阅读单选中等难度题查看答案及解析
You may know about “junk food” like French fries. But do you know about “junk sleep”? Recently, a British survey found that electronic products(电子产品) in teenagers' bedrooms are affecting(影响)their sleep.
The survey was done among 1,0 00 British kids from 12 to 16. It found that 30 percent of them got just 4 to 7 hours of sleep every day. But doctors say they need 8 to 9 hours. Almost a quarter of the kids said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.
“This is very worrying.” said Dr Chris , a British expert, “We call it ‘junk sleep’, It means you don't get enough sleep and the quality of the sleep is bad, too. If you don't get good rest, you don't perform well in school the next day.”
The survey found that 40 percent of the kids felt tired each day, with girls between 13 and 16 feeling the worst. Nearly all the teenagers have a phone, Mp5 or TV in their bedroom. And many of them have all three.
1.This passage is mainly about ________.
A.junk food B.junk sleep
C.electronic products D.the importance of sleep
2.________ of the children in the survey sleep only 4 to 7 hours a day.
A.200 B.300 C .500 D.1,000
3.“Junk food” and “junk sleep”are similar to each other in the way that ________.
A.they are both low in quality
B.they are both produced in factories
C.people enjoy both in their spare time
D.they are both good to people's health
4.Which of the following is TRUE according to the passage?
A.Teenagers need 4 to 7 hours of sleep each day.
B.Few of the teenagers have a phone in their bedrooms .
C.Teenagers spend too much time on electronic products.
D.Girls between 15 and 16 spend the least time on electronic products.
5.Which of the following is the best solution to the problem?
A.Parents watch TV together with their children.
B.Forbid teenagers to use any electronic product.
C.Teenagers should be limited (限制) to their use of the electronic products.
D.The use of mobile phone and Mp5 is not allowed at school.
八年级英语阅读理解中等难度题查看答案及解析
You may know about “junk food” like French fries. But do you know about “junk sleep”?
Recently, a British survey found that electronic(电子的) products in teenagers’ bedrooms are affecting(影响) their sleep.
The survey was done among 1,000 British kids from 12 to 16.It found that 30% of them got just 4 to 7 hours of sleep every day. But doctors say they need 8 to 9 hours.
Almost a quarter of the kids said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.
“This is very worrying,” said Dr. Chris Idzikowski,a British expert,“We call it ‘junk sleep’.It means you don’t get enough sleep and the quality of the sleep is bad, too. If you don’t get a good rest,you don’t perform well in school the next day.”
The survey found that 40% of the kids felt tired each day,with girls between 13 and 16 feeling the worst. Nearly all the teenagers have a cellphone,an iPad or a TV in their bedrooms. And many of them have all the three.
1.This passage is mainly about ________ .
A.junk food B.junk sleep C.electronic products
2.________ of the children in the survey sleep only 4 to 7 hours a day.
A.200 B.300 C.500
3.“Junk food” and “junk sleep” are similar to each other in the way that ________ .
A.they are both low in quality(质量)
B.they are both produced in factories
C.they are both good for people’s health
4.Which of the following is TRUE according to the passage?
A.Teenagers need 4 to 7 hours of sleep each day.
B.Few of the teenagers have a cellphone in their bedrooms.
C.Teenagers spend too much time on electronic products.
5.Which of the following is the best solution to the problem?
A.Parents watch TV together with their children.
B.Make teenagers not use any electronic product.
C.Make teenagers limit(限制) their use of the electronic products.
八年级英语阅读单选中等难度题查看答案及解析
–Why do you always sleep _________?
--Because I’m afraid of darkness.
A. by yourself B. with the door open
C. with the window open D. with the light on
八年级英语单项填空中等难度题查看答案及解析
— Why do you want another job, Mark?
— Because I think the job is __ and it always makes me feel __.
A. boring; bored B. boring; boring C. bored; boring
八年级英语单选题中等难度题查看答案及解析
—Why do you want another job,Julia?
—Because I think my present (现在的) job is ________,and it always makes me feel ________.
A. boring,boring B. bored,boring
C. bored,bored D. boring,bored
八年级英语单选题中等难度题查看答案及解析
Do you know what color will be popular in the future?
Some people think blue will be popular because blue means peace and kindness. Everybody in the world hates war(战争). Blue will make people remember to keep the world peaceful.
Other people think green will be popular because they think green is the color of nature. Now the environmental problem is very serious. People in the world are thinking more about how to look after the environment. When people wear green clothes, they will keep the environment in their hearts and try to make the environment better.
Yellow will be another popular color.Why will it be popular? People are very busy these days because they have a lot to do.Yellow is a soft color and it can make people feel relaxed.
Most people think black will be the most popular color.It always looks cool, and men often show off their social positions(社会地位)by using this color.
阅读这篇短文,根据短文内容回答下列问题。
1.Do people think blue means war?
_________________________________________________
2.Why do some people think green will be popular?
_________________________________________________
3.What can yellow make people feel?
_________________________________________________
4.Which color is chosen by most people?
_________________________________________________
5.What does the passage mainly talk about?
_________________________________________________
八年级英语阅读理解中等难度题查看答案及解析
—He didn’t pass his math test. Do you know why?
—Because he didn’t work to pass the test.
A. hard enough B. enough hard C. good enough
八年级英语单选题简单题查看答案及解析
—Jack _______ his job last week. Do you know why?
—Because he was always late for work.
A. found B. lost C. loved D. disliked
八年级英语单选题简单题查看答案及解析