Air is all around us. It is around us as we talk and play. From the moment we we

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Air is all around us. It is around us as we talk and play. From the moment we were born, We are surrounded(围绕)by air. When we sit down, it is around us. When we go to bed, air is also around us. Wherever we are on the earth, We are surrounded by air. We live in air.
All living things need air, living things can’t live without air. We can go without food or water for a few days, but we can’t live for more than a few minutes without air. We breathe(呼吸)in air. When we are working or running, We need more air. So we breathe faster than usual. When we are asleep, We need less air.
小题1:From the text, we know that on the earth _____

A．there is air everywhere

B．some animals don’t need air

C．plants need more air

D．for a long time people don’t need air

小题2:The writer tells us that _____

A．there is less air on the earth than on the moon

B．the earth is covered with air

C．the earth is covered with water

D．there is no air on the earth

小题3:Which is the first important thing for people’s lives?

A．Water

B．Air

C．Food

D．Sunlight

小题4:Which of the following things needs air?

A．Land

B．A mirror

C．A cat

D．A river

小题5:A man needs more air when he _____

A．dies

B．runs fast

C．takes a rest

D．sleeps

答案

小题1:A
小题2:B
小题3:B
小题4:C
小题5:B

解析

试题分析：这篇短文主要说明了空气在我们身边无处不在，并论证了空气对于我们的重要性。
小题1:根据第一段Air is all around us. 及下文描述，可知空气无处不在，故选A。
小题2:根据第一段Wherever we are on the earth, We are surrounded by air. We live in air. 描述，可知选B。
小题3:根据第二段All living things need air, living things can’t live without air. 描述，可知选B。
小题4:根据第二段All living things need air, living things can’t live without air. 描述，可知选C，猫。
小题5:根据第二段When we are working or running, We need more air. 描述，可知选B。
点评：本文浅显易懂，层次分明，学生很容易把握文章中心内容。答题中注意带着问题阅读短文，一般就能顺利找出答题依据，完成较易。

举一反三

A kind of little cars may some day take the place of today’s cars. If everyone drives such cars in the future，there will be less pollution from the cars. There will also be more space for parking cars in cities，and the streets will be less crowded. Three such cars can park in the space now needed for one car of the usual size.
The little cars will cost much less to own and to drive. Driving will be safer，too，as these little cars can go only 65 kilometers an hour. The cars of the future will be fine for getting around a city，but they will not be useful for long trips. Little cars will go 450 kilometers before needing to stop for more gas(汽油).
If big cars are still used along with the small ones，two sets of roads will be needed in the future. Some roads will be used for the big，quick cars and other roads will be needed for the slower，smaller ones.
小题1:There is much pollution from the cars today because________.

A．people drive big cars	B．the cars go 65 kilometers an hour
C．people drive small cars	D．the cars can go 450 kilometers an hour

小题2:The usual size of cars today are________that of future cars.

A．smaller than

B．the same as

C．three times as large as

D．a little larger than

小题3:We can learn from the passage that________.

A．big cars cost less to own and to drive

B．the cars of the future will be much smaller than today’s cars

C．big cars are not useful for long trips

D．small cars are faster than big ones

小题4:The street will be less crowded in the future because________.

A．there will be fewer cars	B．there will be fewer people in the street
C．driving future cars will be safe	D．future cars will be much smaller

小题5:Two sets of roads may be needed in the future because________.

A．there will be too many cars in the future

B．more and more people will get around a city

C．big cars will be used along with the small ones

D．it looks more beautiful to have two sets of roads

题型：不详难度：| 查看答案

Look at the center circles of Diagram (图) A and Diagram B. Which of the centre circles looks larger?
Take a first look and you probably think that the centre circle in Diagram A is smaller than that in Diagram B. In fact , they are exactly the same size.
Then look at the picture on the right. What do you see? A vase ? Or two faces? Does the picture change quickly from one to the other again and again? Maybe or maybe not, but you can never see them at the same time.
"What"s happening? Is something wrong with my eyes?" You may wonder at what you see. Don"t worry. Here is how it goes:
When we look at things, our eyes send messages to our brains and then our brains interpret (解读) the information. However, sometimes our brains interpret the received information in a wrong way. It seems that our eyes are playing a joke on us. This often happens and we call it "Visual illusion" (视觉错误).
Movie makers often make use of illusions. They make the objects around actors much smaller or bigger than usual. This makes us believe that the actors are much larger or smaller than they usually are. The movies Jurassic Park and Honey I shrunk the kids just make use of illusions.
小题1:The centre circle in Diagram A looks smaller than that in Diagram B. That"s because           .
A. something is wrong with our eyes
B. the two circles are not the same size
C. our brains interpret the information in a wrong way
D. the two pictures change quickly from one to the other
小题2:What"s the right order according to the passage?
a. We look at things with our eyes.              b. Our brains interpret the messages.
c. Our brains tell us what we have seen.      d. Our eyes send messages to our brains.

A．adbc

B．cabd

C．acdb

D．bcad

小题3:Movie makers make use of visual illusions to .

A．help the actors look better

B．make the actors much braver

C．help the actors become stronger

D．make the actors seem different in size

小题4:In the picture on the right, it seems that Line AB is shorter than Line CD, but in fact Line AB is as long as Line CD. Which paragraph can explain what has happened to our eyes?___________

A.The second one.
B.The third one.
C.The fifth one.
D.The sixth one.
小题5:The text is probably taken from .

A．an advertisement

B．a science book

C．a movie magazine

D．a story book

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A person has been badly injured in a car accident. It is necessary to give him a transfusion (输血) because he has lost much blood in the accident. However, special care must be taken in selecting new blood for him. If the blood is too different from his own, the transfusion can kill him.
There are four basic blood groups: A, B, AB and O. A single test can tell us a person’s blood group. Everybody is born with one of these four blood groups. People’s blood group, like hair colour, is inherited (继承) from parents.
Because the substances contained in each group are different, transfusion must be given carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can be given to any other group, so it is often called the universal donor. On the contrary, AB is sometimes called the universal recipient (接受者). However, before being given the transfusion, patients usually receive only salt or plasma (血浆) until their blood can be matched as exactly as possible. In this way, it is possible to avoid any bad results of the transfusion.
There is a relationship between our blood groups and our nationalities. Among the Europeans, about 42 percent are blood group A while 45 percent are blood group O. The rarest is blood group AB. However, some American Indian groups are nearly 100 percent blood group O.
小题1:Which of the following shows the correct relationship in blood transfusion? (→ =" giving" blood to)

小题2:Usually, before being given a transfusion, ________.

A．a person needs to receive salt or plasma first

B．a person needs to have a good rest

C．a person needs to have a lot of food and water

D．a person needs to find the person with the same blood group as him

小题3:The third most common blood type among the Europeans is _______.

A．A

B．B

C．AB

D．O

小题4:Which is NOT right according to the passage?
A. A person’s blood group depends on his parents.
B. There is only one kind of blood group in a person’s body.
C. About 13 percent of the Europeans have blood group AB.
D. Most of American Indians can be universal blood donors.
小题5:Which is the best title for the passage?

A．Blood transfusion	B．Blood groups
C．Car accidents	D．Blood group and nationalities

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When an animal helps another animal, it usually gets something valuable in return. For a long time, many scientists thought that only people could act generously just because it feels good.
However, a new study in Germany suggests that chimpanzees (黑猩猩)also do good things for no real reason. And so do children who are as young as 18 months of age. Maybe it is because humans and chimpanzees share an ancestor(祖先) about 6 million years ago.
People and chimpanzees appear to develop such features(特征) without any other training, says Warneken, a scientist in Germany. Warneken and his partners worked on adult chimpanzees that live on an island in the African country of Uganda. They also worked with 18-month-old children in Germany. The researchers performed three experiments on the adult chimpanzees and two experiments on the kids. In the first animal experiment，a person tried to reach his arm into a cage to get a stick，but he couldn’t reach it. A chimpanzee was in the cage，and it could reach the stick if it wanted to.
Thirty-six chimpanzees took part in this experiment one by one, and no chimpanzee saw what the other chimpanzees had done. Even though the animals hadn’t met the person before, they usually took the stick and gave it to the person. What’s more, they did this whether or not the person offered them bananas as a reward. In a similar experiment, 36 children acted in a similar way. They helped the person reach the stick, whether or not they were offered toys for their help.
Researchers did other experiments on chimpanzees and babies. No rewards were offered in either experiment. And still, both the chimpanzees and children went out of their way to help. Still, the new study is different from earlier findings. Researchers have found that chimpanzees don’t give rewards of food to other chimpanzees, even if it costs them nothing to be generous.
小题1:Warneken and his partners worked with ________.

A．young chimpanzee that live on an island

B．18-month-old children who live in Germany

C．kids who are living with adult chimpanzees

D．adult chimpanzees that live on the African mountain

小题2:A new study in Germany suggests that ________.

A．people also share information for good reason

B．children know something at the age of 18 months

C．chimpanzees do good things for no real reason, too

D．humans should develop their abilities 6 million years ago

小题3: Which of the following is NOT true according to the passage？

A．Thirty-six chimpanzees joined in this experiment one by one

B．No chimpanzee saw what the other chimpanzees had done

C．The animals hadn’t met the person before the experiments

D．Chimpanzee gave the person the stick in order to get a reward

小题4:From the passage we know that ________.

A．both chimpanzees and children can find their way to help others

B．chimpanzees will reward good food to other chimpanzees

C．children is more generous than chimpanzees in some ways

D．both chimpanzees and children can do the difficult experiments

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School uniforms are common in primary and secondary schools in many countries. Here’s a list of countries below.

	In Brazil, students wear uniforms in private schools. But in public schools, students don’t have to wear uniforms although they might have one. In general, the uniforms are a pair of blue pants and a white T-shirt with the school symbol printed on it.
	School uniforms are used in Cuba. All students wear school uniforms with the color as a symbol of grade level. Children also wear scarves because they are young pioneers(少先队员).
	Japan introduced school uniforms in the late 19^th century. Today, school uniforms are very common. Many boys wear white shirts, short pants and caps. Girls’ uniforms might include a gray pleated (褶)skirt and a white blouse.
	In Singapore, all students must wear uniforms. Though the colors are different from school to school. The normal uniform for boys is shorts or long pants, with a shirt (often white), while girls wear white pinafores(连衣裙) or skirts.

小题1:In Brazil, where is the school symbol?

A．On the pants

B．On the shoes

C．On the T-shirt

D．On the socks

小题2:In Cuba a student wears the scarf as a symbol of _____.

A．grade level

B．cold weather

C．public school

D．young pioneer

小题3:A Japanese girl’s uniform is _____.

A．a pair of blue pants and a white T-shirt

B．a gray skirt and a white blouse

C．a white shirt, short pants and a cap

D．a pinafore or a white skirt

小题4:Which is true about the students’ uniforms in Singapore?

A．School uniforms are the same as China’s.

B．Only the students in private schools wear uniforms.

C．Boys’ uniforms are different from girl’s in color.

D．Students usually wear white shirts or skirts.

小题5:On the school day, a student doesn’t wear the uniform. He probably comes from ______.

A．Brazil

B．Cuba

C．Japan

D．Singapore

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