Most of us spend a third of our lives sleepin...

Most of us spend a third of our lives sleeping. Scientists have been studying the brain to learn what happens while we sleep. Scientists tell us that there are four stages(阶段)of sleep. During each stage our brain behaves differently, and so does our body. Each stage is marked by changes in the pattern of brain waves, which can be recorded by machines.

In the first stage, we drift off to sleep. Our muscles(肌肉)begin to relax. Our heartbeat and breathing slow down. Body temperature and blood pressure(压力)begin to drop. Stage—two sleep is a time of small, fast brain waves. Our eyes move quickly from side to side as if watching a movie. This is known as rapid eye movement, or REM sleep. During REM sleep, dreaming takes place. In stage three the brain wave becomes slower again.

Within about 45 minutes after falling sleep, we progress into the fourth stage – deep sleep. As this happens, our brain sends out slower but larger brain waves. This is the most restful kind of sleep, but it is also the time when sleepers are most likely to change positions or sleepwalk. After deep sleep we return to stage two. As the hours pass, we repeat the sleep cycle four or five times. Then we wake up.

1.How many stages of sleep do we repeat several times during a night?

A.Two. B.Three. C.Four. D.Five.

2.When does a person most likely change his positions?

A.When first falling asleep. B.During stage three.

C.During REM sleep. D.During deep sleep.

3.Which of the following statements is TRUE?

A.We can dream in all the stages of sleep, especially during REM sleep.

B.It is impossible to record the pattern of our brain waves with machines.

C.Our body, like our brain, behaves differently during each stage of sleep.

D.It takes about 45 minutes to complete the sleep cycle after we fall asleep.

九年级英语阅读单选中等难度题查看答案及解析

阅读下列短文，根据短文信息完成文后表格，每空一词。

We spend one third of our lives in bed! Everyone needs a relaxing sleeping environment There is no doubt that the design of your bedroom is really important But how? Here’re some golden rules to remember if you are decorating your bedroom.

Choose a proper colour

Colour is the key! Choosing the right colour of your bedroom should be the first decision when designing the space. A general rule is to avoid using overly bright colours in it You might be pleasantly surprised when you try out the colours that bring you peace.

Light it up

It is important to choose the correct lighting when designing a bedroom. Besides practical ceiling lighting, lamps and floor lamps can also make it easy for you to get into a sleepy state in the evening. So don't forget to introduce smaller pockets of light around the room.

Create space to breathe

A tidy room helps you feel calmer. Please remember to reduce the unnecessary furniture and choose the one with doors to hide away the messy clothing shelves. The less furniture you have, the better your room will be, as you will open up floor space to allow the room to appear bigger and less crowded.

Give it a soft touch

The material of bedding can bring you different sleep feelings. Something soft is always the first choice. For example, good quality pillows（枕头）will make you relaxed and suit almost all requirements. A well-chosen duvet（羽绒被）will keep you sleeping through the coldest winter nights, and it won't be too hot or heavy during the summer.

In a word, the standard of designing your bedroom is to keep it comfortable.

九年级英语填空中等难度题查看答案及解析

People spend almost a third of their lives doing one thing: sleeping. Every year there is a day for people around the world to celebrate the _______ of good and healthy sleep一World Sleep Day.

Sleep is like food for the _______. A good amount of sleep helps the body and brain grow and_______ People of different _______ need different amounts of sleep.' According to the National Sleep Foundation in the US, _______ need seven to nine hours of sleep every night. For students aged 10 to 17, a(n）_______ amount is about eight to nine hours per night.

_______, many students don't get enough sleep because of early school start times and too　　 much homework. The China Youth and Children Research Centre reported that about 80 percent of middle school students don't get _______ sleep.

A lack（缺乏）of sleep can _______ influence a person's life. Students ____________ don't get enough sleep may get poor grades. They cannot pay ____________ in class or do well in sports.

To solve this problem, scientists advise that students should have ____________schoolwork and more time to sleep. There are some other ways to help people get enough sleep, such as ____________ a 20-minute nap during the day. Good sleep habits are also ____________. For example, try to go to sleep and wake up at the same time every day, ____________ on weekends and during holidays.

1.A.importance B.influence C.difference D.habit

2.A.arm B.brain C.leg D.shoulder

3.A.disappear B.discover C.develop D.destroy

4.A.countries B.names C.ages D.jobs

5.A.doctors B.parents C.scientists D.adults

6.A.impossible B.different C.difficult D.healthy

7.A.Besides B.Otherwise C.Also D.However

8.A.good B.long C.enough D.many

9.A.closely B.greatly C.hardly D.mostly

10.A.who B.which C.whom D.what

11.A.visit B.work C.money D.attention

12.A.more B.much C.less D.fewer

13.A.making B.taking C.catching D.sleeping

14.A.harmful B.helpful C.thankful D.wonderful

15.A.even B.always C.usually D.never

九年级英语完型填空中等难度题查看答案及解析

阅读下面短文，用括号内所给词的适当形式填空，必要时可加助动词或情态动词。

People spend almost a third of their lives doing one thing—sleeping. Every year, there is a day for people around the world to celebrate the1. (important) of good and healthy sleep—World Sleep Day.

Sleep is like food for the brain. Healthy sleep helps the body and brain grow and develop. People of different ages need different amounts of sleep. It is said that eight hours per night2. (consider) the average amount of sleep. For students aged 10 to 17, a healthy amount is about eight to nine hours per night. However, last year, the China Youth and Children Research Center 3. (report) that about four4. (five) of middle school students didn’t get enough sleep. For some students, they want to sleep early, but they keep 5. (worry) about their schoolwork and can’t fall 6. (sleep) quickly. A lack (缺乏) of sleep can greatly affect (影响) a person’s life. Students who don’t get enough sleep may get poor grades. They cannot pay attention in class or do well in sports.

7. (solve) this kind of problem, scientists advise that students should have

8. (little) schoolwork and more time to sleep. There are some other ways to help people get enough sleep, such as 9. (take) a 20-minute nap (午睡) during the day, trying to go to sleep earlier and so on . Good sleeping habits are also 10. (help). For example, try to go to sleep and wake up at the same time every day, even on weekends and during the day.

九年级英语语法填空中等难度题查看答案及解析

I read somewhere that we spend a full third of our lives waiting. But where are we doing all of this waiting, and what does it mean to an impatient society like ours? To understand the issue, let's take a look at three types of "waits".

The very purest form of waiting is the Watched-Pot Wait. It is without doubt the most unpleasant of all. Take filling up the kitchen sink (洗碗池) as an example. There is completely nothing you can do while this is going on but keep both eyes fixed on the sink until it's full. During these waits, the brain runs away from the body until the water runs over the edge of the counter and onto your socks. This kind of wait makes the waiter helpless and absent-minded.

A cousin to the Watched-Pot Wait is the Forced Wait. This one requires a bit of discipline. Properly preparing packaged noodle soup requires a Forced Wait. Directions are very specific. "Bring three cups of water to boil, add mix, simmer (炖) three minutes, remove from heat, let stand five minutes." I have my doubts that anyone has actually followed the procedures (步骤) strictly. After all, Forced Waiting needs patience.

Perhaps the most powerful type of waiting is the Lucky-Break Wait. This type of wait is unusual because it is mostly voluntary. Unlike the Forced Wait, which is also voluntary, waiting for your lucky break does not necessarily mean that it will happen.

Turning one's life into a waiting game requires faith and hope, and is strictly for the optimists (乐观派) among us. It seems to be silly to follow the directions on soup mixes, but the Lucky-Break Wait well serves those who are willing to do it. As long as one doesn't come to depend on it, wishing for a few good things to happen never hurts anybody.

We certainly do spend a good deal of our time waiting. The next time you're standing at the sink waiting for it to fill while cooking noodle soup that you'll have to eat until a large bag of money falls out of the sky, don't be desperate. You're probably just as busy as the next guy.

1.What is the difference between the Forced Wait and the Watched-Pot Wait?

A. The Watched-Pot Wait involves body and brain.

B. The Forced Wait makes people helpless.

C. The Watched-Pot Wait needs directions.

D. The Forced Wait requires some self-control.

2.What can we learn about the Lucky-Break Wait?

A. It is less voluntary than the Forced Wait.

B. It brings more results than the Forced Wait.

C. It doesn't always bring the result we want.

D. It doesn't give people faith and hope.

3.What does the writer advise us to do the next time we are waiting?

A. Don't lose heart. B. Don't depend on others.

C. Do something else. D. Take it seriously.

4.The writer supports his opinion by _________.

A. describing detailed processes of "waits"

B. analyzing different kinds of "waits"

C. exploring several causes of "waits"

D. showing disappointing results of "waits"

九年级英语阅读单选困难题查看答案及解析

I read somewhere that we spend a full third of our lives waiting. But where are we doing all of this waiting, and what does it mean to an impatient society like ours? To understand the subject, let's take a look at three kinds of "waits".

The very typical form of waiting is the Watched-Pot Wait. It is without doubt the most boring of all. Take filling up the kitchen sink（洗碗池）as an example. There is completely nothing you can do while this is going on but keep both eyes fixed on the sink until it's full. During these waits, the brain flies away from the body and has your head in the clouds until the water runs out of the sink and onto your socks. This kind of wait makes the waiter helpless and mindless.

A cousin to the Watched-Pot Wait is the Forced Wait. This one requires the waiter to do in a controlled way and follow the directions. Properly preparing noodle soup required a Forced Wait. Directions are very clear. "Bring three cups of water to boil, add mix, cook it slowly for three minutes, stop heating, let stand five minutes." I have my doubts that anyone has actually followed the directions strictly. After all, Forced Waiting requires patience.

Perhaps the most powerful kind of waiting is the Lucky-Break Wait. This kind of wait is unusual in that it is for the most part voluntary（自愿的）. Unlike the Forced Wait, which is also voluntary, waiting for your lucky break does not necessarily mean that it will happen.

Turning one's life into a waiting game requires trust and hope, and is strictly for the optimists（乐观主义者）among us. On the surface it seems as ridiculous（荒谬的）as following the directions on soup mixes, but the Lucky-Break Wait well serves those who are willing to do it. As long as one doesn't come to pass on it, wishing for a few good things to happen never hurts anybody.

We certainly do spend a lot of our time waiting. The next time you're standing at the sink waiting for it to fill while cooking noodle soup that you'll have to eat until a large bag of cash falls out of the sky, be confident and patient. Good things come to those who wait, better things come to those who wait longer. You're probably just as busy as the next guy.

1.What is the difference between the Forced Wait and the Watched-Pot Wait?

A.The Watched-Pot Wait connects body and brain. B.The Forced Wait requires some self-control.

C.The Watched-Pot Wait needs directions. D.The Forced Wait makes people active.

2.The writer probably agrees that _________.

A.The Lucky-Break Wait doesn't give people faith and hope.

B.Everyone really follows the directions during the Forced Wait.

C.The Lucky-Break Wait doesn't always bring the expected result.

D.The waiter doesn't need to do anything during the Watched-Pot Wait.

3.What is the writer's main purpose in writing this passage?

A.To question about people's behaviors of waiting.

B.To show why people are impatient while waiting.

C.To help people know their feelings while waiting.

D.To advise us not to lose heart while we're waiting.

九年级英语阅读单选困难题查看答案及解析

We live in a fast-paced(快节奏的), technology-packed world where we spend most of our time indoors playing computer games or using social media(媒体). But do you remember when you spent most of your time outside, running, playing, and laughing with your friends?

Leaving your tech behind may seem difficult, but if you lose yourself in nature, you’ll probably forget all about it. Scientist Albert Einstein once said, “Look deep into nature, and then you will understand everything better.”

In the US, June is Great Outdoors Month. They want to get more kids outside to have active fun once again. Former(前任) US President Barack Obama wrote in a paper declaring(宣告) the day in 2012, “Nature offers each of us the chance to get active, discover something, and make our relationships with family and friends strong.”

The US Union Creek Resort website noted, “We all know how fast life can be, so it’s never too soon or too late to create happy memories that we will cherish and share forever.”

Besides making us feel happy, science supports the idea that outdoor activities can cut down stress. “Fresh air and sunlight have the largest advantages,” wrote Susanne Preston, a mental health expert at South University, US. “With increased exposure(暴露) to natural sunlight, incidents of seasonal affective disorder(季节性情绪失调) fall and the vitamin D in people’s skin helps to relax their moods(心情).”

What could be a better way to help out with daily stress than to enjoy the beauty of the great outdoors?

根据短文内容选择最佳答案。

1.The underlined word “cherish” in the passage means “________” in Chinese.

A.欢呼 B.珍惜 C.振奋

2.The writer wants to tell us to ________.

A.play computer games B.live in a fast-paced world C.spend more time outdoors

3.The word “it” in Paragraph 2 refers to(指的是) ________.

A.your friends B.your tech C.nature

4.Which is NOT TRUE according to the passage?

A.Barack Obama is US President now.

B.We spend most of our time staying indoors.

C.Nature can make our relationships with family and friends strong.

5.What is the main idea of the passage?

A.Leaving your tech behind may seem difficult.

B.It’s nice to enjoy the beauty of the great outdoors.

C.There is only one way to deal with daily stress.

九年级英语阅读单选中等难度题查看答案及解析

—Our head teacher is responsible for his work．He spends most of his time with us．

—________ He always communicates with our parents in his free time．

A．I hope so！　 　　　　　　　　　　　　 　 B．What？

C．That’s for sure．　 　　　　　　　　 D．Why？

九年级英语单项填空中等难度题查看答案及解析

While we are still children ,most of us live at home with our parents, more or less peacefully . But as we become teenagers , things change ,and we begin to grow apart from our parents . This means we are almost ready to leave the house where we grew up and make a new home of our own .

All humans must do this ,but they don’t all do it in the same way . If ,for instance ,you belong to a primitive tribe (原始部落) ，then as you grew up ,you’d learn the skills you needed as an adult---how to catch fish ,how to keep the house and look after children . You would be ready to marry in your early teens and you would build a house and live near your family in the village.

This seems a very old way of life , but it is what humans have been used to through hundreds of years. And it is what we are still used to in the 21st century ,for man hasn’t changed in the short time since he became civilized(文明的). But could you leave home and look after yourself during the teen years ? Most people would not do very well . Why ? Because although man hasn’t changed very much , the society he lives in has changed greatly ,which means that we have to learn more and more before we are ready to leave our parents’ shelter( 居所 ) and live alone .

However ,sometimes it is very frustrating to live at parents’ home . Parents can be very upset about late nights ,criticizing friends and always saying that we are noisy and dirty . But we still need our emotional (情感的) shelter till we finish our studies , and that is why we usually stay in our parents’ home until we feel grown up enough to deal with living alone .

1.When does the relationship with parents start changing ?

A. When we are children.　　　　　　　　 B. When we become teenagers.

C. When we are alone.　　　　　　　　　　 D. When we get married.

2.For most teenagers of the 21st century ,making a new home of their own may be ________.

A. difficult　　　　　　 B. unimportant　　　　　　

C. impossible　　　　 　　 D. quite easy

3.Why must we know more to be able to live alone ?

A. Because we are becoming less talented.

B. Because our society has changed a lot.

C. Because not enough is taught in our schools.

D. Because man has never really been civilized.

4.From the passage ,we know living at parents’ home when we become teenagers _______.

A. is always pleasant　　　　　　　　　　　　　　 B. must be very exciting

C. makes us feel lonely　　　　　　　　　　　　 D. may be annoying

九年级英语阅读理解极难题查看答案及解析

While we are still children ,most of us live at home with our parents, more or less peacefully . But as we become teenagers , things change ,and we begin to grow apart from our parents . This means we are almost ready to leave the house where we grew up and make a new home of our own .

All humans must do this ,but they don’t all do it in the same way . If ,for instance ,you belong to a primitive tribe (原始部落) ，then as you grew up ,you’d learn the skills you needed as an adult---how to catch fish ,how to keep the house and look after children . You would be ready to marry in your early teens and you would build a house and live near your family in the village.

This seems a very old way of life , but it is what humans have been used to through hundreds of years. And it is what we are still used to in the 21st century ,for man hasn’t changed in the short time since he became civilized(文明的). But could you leave home and look after yourself during the teen years ? Most people would not do very well . Why ? Because although man hasn’t changed very much , the society he lives in has changed greatly ,which means that we have to learn more and more before we are ready to leave our parents’ shelter( 居所 ) and live alone .

However ,sometimes it is very frustrating to live at parents’ home . Parents can be very upset about late nights ,criticizing friends and always saying that we are noisy and dirty . But we still need our emotional (情感的) shelter till we finish our studies , and that is why we usually stay in our parents’ home until we feel grown up enough to deal with living alone .

1.When does the relationship with parents start changing ?

A. When we are children .

B. When we become teenagers .

C. When we are alone .

D. When we get married .

2.For most teenagers of the　 21st century ,making a new home of their own may be ________.

A. difficult　　　　 B. unimportant

C. impossible　　　 D. quite easy

3.Why must we know more to be able to live alone ?

A. Because we are becoming less talented .

B. Because our society has changed a lot .

C. Because not enough is taught in our schools.

D. Because man has never really been civilized.

4. From the passage ,we know living at parents’ home when we become teenagers _______ .

A. is always pleasant

B. must be very exciting

C. makes us feel lonely

D. may be annoying

九年级英语阅读理解中等难度题查看答案及解析