What is the first thing you want to do when y...

What is the first thing you want to do when you see someone yawn（打哈欠）？You want to yawn, too! Yawning is contagious.

Scientists have found that all people yawn. Babies start to yawn even before they are born. The earliest yawn takes place when a baby is still inside its mother. When young children are about one year old, they start to yawn when they see others yawning. That’s why scientists seem to think yawning is contagious.

It’s no secret that yawning is contagious, but why do we yawn? Well, scientists are not really sure.

Some think we yawn because we feel bored. Recently scientists studied two groups of students between the ages of 17 and 19. One group watched music videos, and the other watched a boring color test. Scientists compared the numbers of their yawns and found that the color test group yawned more times than the video group.

Another reason for yawning has to do with breathing. Some scientists believe that when we are bored or tired, we breathe more slowly. As our breathing slows down, we cannot get rid of （去除）enough carbon dioxide, our bodies will tell the brains（大脑）to breathe deeply. The result is a big yawn.

In 2007, scientists suggested a new reason. They said that the reason why people yawned was to cool down their brains. These scientists found that people who were warmer than others yawned more often.

Scientists are still trying to find out why yawning happens and why it is so contagious. But they are only sure that when one person yawns, almost everyone else nearby wants to yawn, too.

1.The underlined word “contagious” in Paragraph 1 means _________.

A. helpful to our health

B. passing from one person to another

C. hard to understand

D. getting into one trouble after another

2.According to the scientists, people start to yawn when they are _______.

A. born        B. one year old    C. 17 or 19 years old    D. inside their mothers

3.Which of the following are the possible reasons for yawning according to the passage?

①People yawn because they are bored    　

②People yawn to catch others’ attention

③People yawn to cool down their brains    　

④People yawn to get rid of carbon dioxide.

A. ①②③            B.②③④            C.①②④            D.①③④

4.We can probably read this passage in a ____________

A. storybook    B. travel guidebook        C. movie poster    D. science magazine

九年级英语阅读理解中等难度题查看答案及解析

What is the first thing you want to do when you see someone yawn(打哈欠)? You want to yawn, too! Yawning is contagious.

Scientists have found that all people yawn. Babies start to yawn even before they are born. The earliest yawn takes place when a baby is still inside its mother. When young children are about one year old, they start to yawn when they see others yawning. That's why scientists seem to think yawning is contagious.

It’s no secret that yawning is contagious, but why do we yawn? Well, scientists are not really sure.

Some think we yawn because we feel bored. Recently scientists studied two groups of students between the ages of 17 and 19. One group watched music videos, and the other watched a boring color test. Scientists compared the numbers of their yawns and found that the color test group yawned more times than the video group.

Another reason about yawning has to do with breathing. Some scientists believe that when we are bored or tired, we breathe more slowly. As our breathing slows down, we cannot get rid of(去除) enough carbon dioxide (CO2) in our bodies. When there is too much carbon dioxide, our bodies will tell the brains (大脑) to breathe deeply. The result is a big yawn.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

In 2007, scientists suggested a new reason. They said that the reason people yawned was to cool down their brains. These scientists found that people who were warmer than others yawned more often.

Scientists are still trying to find out why yawning happens and why it is so contagious. But they are only sure that when one person yawns, almost everyone else nearby wants to yawn, too.

1.According to the scientists, people start to yawn when they are　　　　 .

A. born　

B. inside their mothers

C. 17 or 19 years old

D. one year old

2.Which of the following are the possible reasons about yawning according to the passage?

People yawn because they are bored.　

People yawn to catch others' attention.

People yawn to cool down their brains.

People yawn to get rid of carbon dioxide.

A. 　　　　 B. 　　　　　 C. 　　　　　 D.

3.We can probably read this passage in a _　　　　 _.

A. story book　　　　　　　　　　 B. travel guidebook

C. science magazine　　　　　　 D. movie poster

九年级英语阅读理解中等难度题查看答案及解析

When you think of robots, what is the first thing that comes to mind? Do you think of science fiction movies like Star Wars, where robots of all shapes and sizes are part of daily life? The word “robot” itself comes from a play written in 1920 by Karel Capek. In the play, people create robots to do some everyday tasks.

Today, most robots don’t look human. Modern robots take many forms and are good at many things, from sweeping the floors in your home to working in factories. They are even exploring the surface of the moon. But there is an interesting irony(讽刺) in the world of robotics which describes a surprising problem: What humans find easy is extremely complicated for a robot. However, what humans find difficult is pretty easy for a robot. For example, picking up clothes in a messy room is simple for people. But that kind of chore is very hard for a robot. Another example is the game of chess. People might find it difficult to win the game of chess all the time. But robots like Alpha-Go can be programmed to play it very well.

This is because robots are very good at doing things in controlled environments. However, moving through a room filled with random(随机的) objects is hard for robots, along with picking up objects of different shapes and sizes without damaging them. In short, it is very difficult for them to deal with certain types of variables.

It turns out that one of the most difficult things to improve in robots is their ability to control objects. Luckily, great progress is being made in the development of robots. On the one hand, exciting developments in making human-like hands and legs are underway. On the other hand, the biggest progress might result from using virtual learning(虚拟学习) to “teach” robots through computer simulations(模拟). In this way, robots can “guess” what to do without an order when they meet unfamiliar things in the real world.

Soon, robots may be able to do those things that humans find simple. That means big changes in what robots can do and how they can help us with daily tasks. Robots might make movies a reality.

1.What’s the purpose of the first paragraph?

A.To give an example.

B.To present the topic.

C.To explain what robots are.

D.To show how robots develop.

2.According to the passage, what might be difficult for robots?

A.Playing chess.

B.Washing the dishes.

C.Making cars in factories.

D.Gathering up clothes in a mess.

3.What’s the writer’s opinion about robots in the future?

A.They will cause further problems for people.

B.They will deal with new things depend on orders.

C.They can hardly develop until they look like human.

D.They can benefit people more by making improvements.

九年级英语阅读单选中等难度题查看答案及解析

Have you ever wanted to stop eating something sweet but you just couldn’t ?Is the first thing you do wehn you get home from schol to look in the biscuit tin ?Can you eat a huge bar of chocolate all by yourself ?Can you say “no”to sweets at parties ?If you can’t ,thenn there is a reason ...perhapos you are a sugar addict !Does that sound funny ?Well ,doctors say that people who eat sweets regularly can easily becoame addicted to sugar .What’s more ,most sugar addicts don’t even realize that they are addicted !Sugar addiction is serious becauase it can really damage your health .doctors say that we should eat food which is healthy such as fresh fruits and vegetables,and that we shouldn’t eat a lot of sugar ,fat or fast food .But sugar addicts can’t follow this advice .They know they must stop eating sweet food,bu htey can’t .

So what can you do if you think you are ddced o he taste of sugar?Well here is some advice :

Eat some fresh fruits when you really want something sweet to eat .

Cut down　 son sweet foo lowly .Don’t try to stp eating it at once

You have to tell　 your parents ,If they know ,they will help you.

1.What does the nderlined word “damage”mean ?

A.be kind to　　 　　 B.be good ofr　

C.be harmful to　　 D.be sorry for

2.What can we infer from the passage?

A.Fresh fruits are the best food for us.

B.We shouldn’t eat　 sugar to keep healthy .

C.Parents may help you to give up bad eating habits.

D.It’s necessary to stop eating swet food at once.

3.What’s the main idea of the passsage?

A.Some advice to stop eating sweet food

B.The importance of having good eating habits .

C.The reasons why people become addicted to sugar .

D.Something about sugar addiction and how to give it up.

九年级英语阅读理解中等难度题查看答案及解析

—What do you want to do ____ those old boxes?

— To put things in when I move to the new flat(一套房间).

九年级英语单项填空简单题查看答案及解析

If you want to ride well, the first thing to do is to ______ your fear of horses.

A. cause　　 B. double　　 C. overcome　　 D. increase

九年级英语单选题中等难度题查看答案及解析

When you're in school, the last thing you want to do is to work on weekends. There's homework to do, sports to play, fun to have. But our parents may persuade(劝说) us to find a job to earn money and get some life experience. When I was a teenager, I had to deliver the newspapers to people's homes. Then I got a Saturday job at a supermarket: putting everything in order on the shelves and working as a shopkeeper.

Today in the UK you can work from the age of 13 and many children have part-time jobs. It is almost seen as an adult ceremony. It's an independent experience. Teenagers agreed that it taught them valuable lessons about working and managing money with adults. So that's not a bad thing!

Some research suggests that not working on Saturdays or holidays may be harmful to one's later life. But recent statistics（数据统计）show 20％of the students have given up having part-time jobs in the past three years.

So does this mean British teenagers are now more afraid of hard work? Probably not. Some experts believe young people feel that going out to work hinders（阻碍） their performance in school, they are now under more pressure(压力) to study hard, get good grades and have a good job in the long run. However, proper part-time jobs are a great way to help young people learn the skills they need in the workplace. In fact, the key is to keep a balance between taking a part-time job and having enough time to study and rest.

Many young people actually want to work because it gives them a sense of freedom. A 13-year-old girl named Rachel works in a shop on Saturday. She told the BBC: I like my job because I'm making money and it helps me to talk to people confidently and work with others closely. It seems like a valuable thing to do on a Saturday morning.

1.When I was a teenager, I　 ___________at first.

A.had too much homework to do B.played sports with my good friends

C.delivered newspapers to people’s homes D.had a part-time job on Saturday

2.Who can have a part-time job in the UK?

A.Gavin a 14-year-old boy B.Aron an 11-year-old boy

C.Loretta a 12-year-old girl D.Victoria an 8-year-old girl

3.What makes some students give up part-time jobs ?

A.They are now more afraid of hard work.

B.Taking part-time jobs may be harmful to their later life.

C.Going out to work hinders their performance in school.

D.Taking part-time jobs isn’t a great way to help them learn skills.

4.Rachel likes her part-time job because ___________

① She can make some money.

② She can get good grades.

③ It helps her talk with people confidently.

④ It helps her get away from pressure.

A.①② B.③④ C.①③ D.②④

5.The writer’s purpose in writing the passage is___________

A.To introduce his own part-time job experience.

B.To encourage students to take a part-time job.

C.To tell students how to keep a balance between study and jobs.

D.To make a survey on part-time jobs.

九年级英语阅读单选中等难度题查看答案及解析

What should you do if you are in a crowd（人群） The first and most important thing is to make yourself clear where you are 1. where the exits are. No matter where you are, make sure you always know how to get out and to be safe.

Make yourself know the type of ground you are standing2.. Wet or uneven（不平坦的）ground can cause you 3. ( fall) down in a crowd of moving people.

If you find4. (you) in the middle of a moving crowd, you must be careful. Do not walk against the moving direction and do not stop or sit down, because you could get trampled (踩踏) 5. (easy). Instead, move in the same6. (direct) of the crowd. Keep your hands up by your chest（胸部）to protect your chest. If you fall down, get up quickly, If you can't get 7., ask someone to pull you back up. If you have kids, lift 8. (they) up.

If you fall and cannot get up, keep on moving in the same direction of the crowd. If that is not possible , ten cover your head with your arms.

Try to get away from hard things in a crowd. If you're pushed against them, 9. a result, you may be hurt badly.

We should learn 10. (protect) ourselves. Stay away from the crowd.

Remember: Whatever you do, safety is first!

九年级英语阅读单选中等难度题查看答案及解析

根据短文内容，从短文后的A~F选项中选出适当的选项补全短文。

What is the first thing that comes to your mind when you hear the word”hero”? 1. There are onscreen heroes like the superheroes in Avengers(复仇者)，and also everyday heroes in our lives.

Whether they’re championship athletes, groundbreaking(开创性的)scientists, programmers changing the world with a keyboard, firefighters rushing into the burning building, artists creating the works of amazement, or a dog with a baby by his side, “hero” can be the word to describe them.

2.

In general, a hero is someone selfless, courageous and brave. These qualities drive heroes to help others in times of need, even if they are scared. You can count on them to be there for you if something bad happens.

“The people that we set up as heroes are people that generally go above and beyond the call of duty.3.” Nick Carden, a psychologist at the AAPHC Renaissance Center in the US said so.

However, why can some people be heroic? Nick Carden said, heroes are made. “They probably are people that have been influenced by and have been helped by or have been modeled or raised to have those as values.”

Common people—just like you and me—are heroes in their own way, simply just by doing their part for their families and communities. Cleaners, doctors, reporters, delivery workers, nurses, and bus drivers—the list goes on and on.4. And, sometimes, when there are emergencies, these common people show courage and bravery to help complete strangers in need.

Being a hero is the nature of human beings. “The decision to act heroically is a choice that mans or us will be called upon to make at some point in time. Heroism becomes something that seems in the range（范围）of possibilities for every person, perhaps inspiring more of us to answer that call.” heroism researchers Zeno Franco and Philip Zimbardo wrote in Great Good Magazine.5. Be courageous, honest, and a person with integrity(正直). Because, once you are your own hero, you can truly do anything you set your mind to.

A.These common people help keep order in our day-to-day lives.

B.Is it someone who wears a cape(披风）and can fly in the air?

C.Only in this way, you can be your own hero.

D.Most importantly, you should make an effort to be your own hero.

E.They do things that are outstanding.

F.But what makes a person a hero?

九年级英语补全短文6选5中等难度题查看答案及解析

These days, "What do you want to do when you grow up?" is the wrong question to ask children in the USA. The question should be: "What job are you doing now?" American companies are employing more and more young people as consultants（顾问）to evaluate（评估）products for child consumers. The 12-to-19 age group spends more than $100 billion a year in the USA. Specialist agencies help manufacturers ask kids about all the latest trends in clothes, food and other markets. One company, Teenage Research Unlimited, has groups of teenagers who give their decisions on products like jeans. Another company, dole Research Associated, holds two-hour meetings in a room called the "imaginarium". Children are encouraged to play games to get into a creative mood. They have to write down any ideas which come into their heads.

Some manufacturers prefer to do their own market research. The software company Microsoft runs a weekly "Kid's Council" at its headquarter in Seattle, where a group of school children give their decision on the latest products and suggest new ones. They are called young consultants. One 11-year-old consultant, Andrew Cooledge, told them they should make more computer games which are suitable for both boys and girls. Payments for the work are increasingly attractive. Andrew Cooledge was paid $250 and given some software. However, even if their ideas are valuable, the children will never make money. They cannot have the copyright to their ideas.

1.Do children of 12-to-19 age spend more than $100 billion every year in America?

____________________________________________________________________________________________

2.What do the specialist agencies do?

____________________________________________________________________________________________

3.The "imaginariun" is a place where children play games and try to find new ideas, isn't it?

____________________________________________________________________________________________

4.How often does Microsoft run a "Kid' Council" at its headquarter?

____________________________________________________________________________________________

5.What was Andrew paid for his job?

____________________________________________________________________________________________

6.What is your opinion about being a young consultant?

____________________________________________________________________________________________

九年级英语回答问题中等难度题查看答案及解析