Have you ever wondered?1. Why do airplanes ta...

Have you ever wondered?

Why do airplanes take longer to fly west than east?

It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon (大气现象) known as the jet stream (气流). The jet stream is a very high altitude (= above sea level) wind which always blows from the west to the east across the Atlantic. So the planes moving at a constant air speed go faster from the west to the east when they are moving with the wind than in the opposite.

What would happen if the gravity on Earth was suddenly turned off?

Supposing we could magically turn off gravity. Would buildings and other buildings float away? What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth. The earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of the string. Things not attached to the earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling (= top surface of a room). Most things outside would fly off into space.

1.What information can we get from the first passage?

A. It is the jet stream that affects how fast airplanes fly.

B. Planes go slower when they are moving with the wind.

C. It takes more time to fly from NY to London than from London to NY.

D. The jet stream always blows from the east to the west across the Atlantic.

2.The underlined word “shoot” in the 2nd paragraph means “_________”.

A. send for     B. move quickly        C. come out          D. grow quickly

3.It can be known that without gravity _________.

A. buildings and other structures would float away

B. trees and buildings would not so easily fly off

C. something around your head would not float away

D. everything outside buildings would fly off into space

4.Which of the following is not mentioned in the passage?

A. It takes seven hours to travel from London to New York.

B. The earth is moving at a high speed.

C. Things on the earth will float away if there’s no gravity.

D. Things not attached to the earth would fly off in a straight line.

5.Where can we read this passage?

A. In a research paper.                     B. In a short story.

C. In a travel magazine.　　　　　　　　　　     D. In a student’s book

九年级英语阅读理解中等难度题查看答案及解析

Have you ever wondered?

1.      Why do airplanes take longer to fly west than east?

It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon (大气现象) known as the jet stream (气流). The jet stream is a very high altitude (=" above" sea level) wind which always blows from the west to the east across the Atlantic. So the planes moving at a constant air speed go faster from the west to the east when they are moving with the wind than in the opposite.

2.      What would happen if the gravity on Earth was suddenly turned off?

Supposing we could magically turn off gravity. Would buildings and other structures（建筑物）float away? What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth. The earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of the string. Things not attached to the earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling (=" top" surface of a room). Most things outside would fly off into space.

1.What information can we get from the first passage?

2.The underlined word “shoot” in the 2nd paragraph means “_________”.

3.It can be known that without gravity _________.

4.Where can we read this passage?

九年级英语阅读理解中等难度题查看答案及解析

Have you ever wondered?

1. Why do airplanes take longer to fly west than east?

It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet (喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction.

2. What would happen if the gravity on Earth was suddenly turned off?

Supposing we could magically turn off gravity. Would buildings and other structures (建筑物) float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string (细绳), it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Switching off’ gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things outside would fly off into space.

1.What information can we get from the first passage?

A．It is the jet stream that affects how fast airplanes fly.

B．Planes go slower when they are moving with the wind.

C．It takes more time to fly from NY to London than from London to NY.

D．The jet stream always blows from the east to the west across the Atlantic.

2.The word “shoot” underlined in the 2nd passage probably means “__________”.

A．send for                              B．move quickly

C．come out                             D．grow quickly

3.It can be inferred that without gravity __________.

A．buildings and other structures would float away

B．trees and buildings would not so easily fly off

C．something around your head would not float away

D．everything outside buildings would fly off into space

4.Which of the following statements is not mentioned in the passage?

A．It takes seven hours to travel from London to New York.

B．The earth is moving at a high speed

C．Everything on the earth will float away if there’s no gravity.

D．Everything not attached to the earth would fly off in a straight line.

5.Where can we most probably read this text?

A．In a research paper.

B．In a short story.

C．In a travel magazine.

D．In a student’s book.

九年级英语阅读理解中等难度题查看答案及解析

Have you ever complained why life is so tiring? Does the sky sometimes seem dark to you? Do you sometimes think your studies are not 1enough? Well, friends, cheer up and smile all the time. If you 2 the world with your warm heart, you’ll find that the whole world smiles to you.

While in school, sometimes you are tired of your lessons, but have you ever noticed 3  happy smile on your teacher’s face when you did a good job?

One day it is fine. Just 4 you want to go out, it suddenly starts to rain. Maybe you would feel very sad and start complaining about the weather. But dear friends, why don’t you sit down and listen to the free concert 5  the nature offers you? And with the timely rain, crops in the fields will grow better and better and farmers will have a good harvest.

Although everyone wants to succeed in 6  he tries to do, sometimes failure can’t 7. I think failure is not terrible, and the terrible thing is that we are afraid of it and give up8. When we face failure, we must be confident in ourselves, draw a useful lesson from it and try our best 9  what we have decided to do. As a popular saying goes, “Failure is the mother of success.”

Attitude means 10 . Let’s smile to whatever we meet and the whole world will smile to us.

1.                A．success         B．succeed        C．successful D．successfully

2.                A．sees           B．see            C．will see   D．saw

3.                A．/              B．a              C．an   D．the

4.                A．before         B．after           C．and  D．soon

5.                A．where         B．when          C．that  D．what

6.                A．what           B．how           C．when D．which

7.                A．avoided        B．be avoided      C．avoid D．avoids

8.                A．hopes          B．hope           C．hopeful   D．hopefully

9.                A．finish          B．finishing        C．finishes   D．to finish

10.               A．nothing        B．something      C．everything D．anything

九年级英语完型填空中等难度题查看答案及解析

Have you ever thought of such questions as “Why do I have to study math?”or “I am not interested in history at all. My dream is to be an actor. Should I give up history?”

Maybe you are right. After you leave school, it’s not necessary for you to understand everything. But please remember that at school, besides getting knowledge, you should pay attention to some other important things.

First, try to find what you are most interested in. At school, you study many subjects. Try to find what you like and what you don’t like. This may be helpful to you in the future.

Second, maybe you don’t like math and you want to drop it. But the logical thinking ability from math can help you solve some problems. At school, you should practice your brain by thinking.

Third, you should believe in yourself. Maybe you learn French at school, but you don’t need to speak French at all. But learning French can prove that you have the ability of learning languages. Suppose you go to France one day and find a good job well. At school I learned French well, and now I must be able to learn German. But if you have no confidence, what will happen?

Try to challenge yourself as often as possible. I think many of us like playing computer games. When we fail in a game, we always want to try it again. Why? Because it is hard for us to get the highest mark. If we want to challenge ourselves, we must face more difficult things and make greater progress.

1.At school you should______________　　　　 .

A. stop learning the subjects you don’t like

B. both get knowledge and improve your ability

C. pay more attention to math and French

D. learn French instead of English

2.Math can improve one’s_______________.

A. logical thinking ability　　 B. skills in computer

C. interest in other subjects　　 D. ability of finding a job

3.Which of the following is TRUE?

A. You will use everything you learn at school in your future job.

B. It’s not necessary to know what you like at school.

C. Everything you learn at school has an influence　 on you.

D. Logical thinking ability is the most important　 ability.

4.Learning French can help us ___________　　 .

A. have confidence in learning languages　　 B. go to France

C. get a good result in the exam　　 D. make greater progress

九年级英语阅读单选困难题查看答案及解析

In nature, you may see many insects (昆虫）and animals of different colors. Have you ever wondered why?

Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them.It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young,locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.

Brown bears,tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤） in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over , its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

1.It is not easy for birds to catch locusts because____________.

A.locusts are good runners

B. locusts can jump very high

C. locusts are smarter than birds

D. locusts can change their color

2.According to the passage, most soil insects_________

A.do not have bright colors

B. change their colors with the soil

C. do not live in a dark and wet environment

D. Eat colorful insects like butterflies and bees

3.What’s the meaning of the underlined word”survive” in the passage

A. 繁殖　　 B. 产卵　　　　 C. 觅食　　　　 D. 生存

4.The ink fish_______so that its enemies will not see it

A. changes its color　　　　　 B. makes the water around it black

C. appears only at night　　 D. hides itself in the sea rocks

5. What is the main ides of this passage

A. Some insects and animals have different skills.

B. Some insects and animals are clever than we think.

C. Some insects and animals use colors to protect themselves.

D. Some insects and animals can get used to the environment easily.

九年级英语阅读理解中等难度题查看答案及解析

In nature, you may see many insects (昆虫) and animals of different colors. Have you ever wondered why?

Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them.It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young,locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.

Brown bears,tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤) in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive, they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over , its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

1.It is not easy for birds to catch locusts because____________.

A.locusts are good runners

B. locusts can jump very high

C. locusts are smarter than birds

D. locusts can change their color

2.According to the passage, most soil insects_________

A.do not have bright colors

B. change their colors with the soil

C. do not live in a dark and wet environment

D. Eat colorful insects like butterflies and bees

3.What’s the meaning of the underlined word”survive” in the passage?

A. 繁殖　　　　　　　　 B. 产卵　　　　　　　 C. 觅食　　　　　　　　 D. 生存

4.The ink fish_______so that its enemies will not see it?

A. changes its color

B. makes the water around it black

C. appears only at night

D. hides itself in the sea rocks

5. What is the main ides of this passage?

A. Some insects and animals have different skills.

B. Some insects and animals are clever than we think.

C. Some insects and animals use colors to protect themselves.

D. Some insects and animals can get used to the environment easily.

九年级英语阅读理解中等难度题查看答案及解析

In nature, you may see many insects (昆虫）and animals of different colors. Have you ever wondered why?

Locusts(蝗虫) are super delicious food for birds, but it is not always an easy job for birds to catch them .It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young, locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do. Brown bears, tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive, they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts(行为)? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over, its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

1. It is not easy for birds to catch locusts because_________.

A .locusts are good runners

B. locusts can jump very high

C. locusts are smarter than birds

D. locusts can change their color

2.According to the passage, most soil insects_________

A. do not have bright colors

B. change their colors with the soil

C. do not live in a dark and wet environment

D. eat colorful insects like butterflies and bees

3.What’s the meaning of the underlined word “survive” in the passage?

A. 繁殖　　　　　　　 B. 产卵　　　　　　 C. 觅食　　　　 D. 生存

4.The ink fish _______so that its enemies will not see it.

A. changes its color

B. makes the water around it black

C. appears only at night

D. hides itself in the sea rocks

5.What is the main idea of this passage?

A. Some insects and animals have different skills.

B. Some insects and animals are clever than we think.

C. Some insects and animals use colors to protect themselves.

D. Some insects and animals can get used to the environment easily.

九年级英语阅读理解中等难度题查看答案及解析

In nature, you may see many insects (昆虫）and animals of different colors. Have you ever wondered why?

Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them.It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young,locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.

Brown bears,tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤） in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over , its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

1.It is not easy for birds to catch locusts because____________.

A .locusts are good runners                B. locusts can jump very high

C. locusts are smarter than birds            D. locusts can change their color

2.According to the passage, most soil insects_________

A.do not have bright colors

B. change their colors with the soil

C. do not live in a dark and wet environment

D. Eat colorful insects like butterflies and bees

3.What’s the meaning of the underlined word”survive” in the passage?

A. 繁殖            B. 产卵              C. 觅食               D. 生存

4.The ink fish_______so that its enemies will not see it?

A. changes its color                   B. makes the water around it black

C. appears only at night               D. hides itself in the sea rocks

5.What is the main idea of this passage?

A. Some insects and animals have different skills.

B. Some insects and animals are clever than we think.

C. Some insects and animals use colors to protect themselves.

D. Some insects and animals can get used to the environment easily.

九年级英语阅读理解中等难度题查看答案及解析

Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing or whistle when you are happy.

Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

Do you know what a ‘territory’ is? A territory is an area that an animal, usually the male, claims as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.

If so, you have actually scared the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting（筑巢）season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.

You can see that birds have a language of their own. Most of it has to do with attracting mates and setting up territories.

1.Some scientists believe that most of the time bird’s singing is actually________.

A. an expression of happiness　　 B. a way of warning

C. an expression of anger　　 D. a way of greeting

2.What does the underlined word “territory’’ mean?

A. A place where families of other species are not accepted

B. A place where a bird may shout at the top of its voice

C. An area for which birds fight against each other

D. An area which a bird considers to be its own

3.Why do birds keep on singing at nesting season?

A. Because they want to invite more friends

B. Because their singing helps frighten outsiders away

C. Because they want to find outsiders around

D. Because their singing helps get rid of their fears

4.How does the writer explain bird’s singing?

A. By comparing birds with human beings　　 B. By reporting experiment results

C. By describing birds’ daily life　　 D. By telling a bird’s story

九年级英语阅读理解中等难度题查看答案及解析