What do people do with their old, out-of-date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown out with the rubbish.
Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products（产品）. Dell, Hewlett-Packard and other companies now also take back some old computers.
In some countries, laws（法规）are being passed, too. Computer companies will have to pay for collecting and recycling their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade（升级）.
Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations（组织）are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers.
The computers then go to schools, charities（慈善团体）and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things—and cut down on waste, too.What do many people do with old computers?
| A．They repair them. | B．They sell them. |
| C．They send them to others. | D．They stop using them. |
How many computer companies are mentioned in the second paragraph？
| A．One. | B．Two. | C．Three. | D．Four. |
According tothe laws in some countries, computer companies must .
| A．collect and recycle most of their products | B．collect all their used products |
| C．repair and upgrade old computers | D．make more cheaper computers |
What do the organizations do to solve the problem of old computers?
| A．Help the computer companies to collect them. |
| B．Repair and send them to those who need them. |
| C．Help people to learn to use them. |
| D．Turn rubbish into useful things. |
What is the main idea of this passage?
| A．Repairing old computers. | B．Encouraging to make cheap computers |
| C．Recycling old computers. | D．Helping those who need computers. |
A new study finds that plants communicate with one another to warn of danger.
We often consider plants as the furniture of the natural world. They don’t move; they don’t make sounds, they don’t seem to act on anything. But as is often the case, plants talk to each other all the time. And the language is chemical.
Over the years, scientists have reported that different types of plants, from trees to tomatoes, give out chemicals into the air to help neighboring plants. These chemical warnings can spread information about one plant’s disease or infestation(虫害), so other plants can protect themselves. But how plants receive and act on many of the information exactly is still mysterious.
In this week’s Science Magazine, researchers in Japan offered some explanations. They have found out one chemical message and traced it all the way from beginning to end.
The scientists looked at tomato plants infested by a common pest(害虫). To start out, they grew plants in two separate plastic spaces connected by a tube(管子). One plant was infested and placed upwind and the other was uninfested and placed downwind. The downwind plants were later exposed(暴露) to the pest. The results showed that plants near sick neighbors before were able to protect themselves better against the pest.
They found one chemical appeared more often in the exposed plants. The chemical is called HexVic. The scientists discovered where HexVic come from, and put it over healthy plants. Those plants were then able to produce HexVic. Researchers made sure that uninfested plants could fight off bugs and diseases. How do they know when to protect themselves? They are warned first by their friendly plant neighbors.
It is not a simple story, and it may be happening in more plant species than tomatoes. It may also be happening with more chemical signals that are still unknown to us. In a word, we know that plants not only communicate, but also look out for one another.
The underlined “traced” in the fourth paragraph probably means _________ here.
| A．reported | B．followed |
| C．doubted | D．developed |
For scientists, which are the right steps to watch tomato plants infested by a pest?
① Place the infested plant upwind.
② Place the uninfested plant downwind.
③ Expose the downwind plants to the pest.
④ Grow plants in two separate plastic spaces connected by a tube.
| A．③①②④ | B．①④③② |
| C．④①②③ | D．④②①③ |
You can put the sentence “The researches also studied leaves from exposed plants and unexposed plants.” At the beginning of
| A．Paragraph 3 | B．Paragraph 4 |
| C．Paragraph 5 | D．Paragraph 6 |
Which of the following can be the best title of this passage?
| A．Communicating Plants and Terrible Diseases |
| B．Talking Plants and Friendly Warnings |
| C．Protecting Plants and Clear Information |
| D．Growing Plants and Mysterious Chemicals |
Do you know the reason why we feel tired in the middle of a class？Maybe you would say it is because the teacher's class is boring. （1） Perhaps this is something you have not paid enough attention to or not yet noticed.
Purpose of sleep
（2） Sleep helps our body heal（修复），grow，and stay healthy.It also gives us energy，so we can be active all day.Doctors and health scientists say：When you close your eyes and need t rest，sleep is just the very best!This is more than advice.
Sleep time
Enough sleep is important to us.How much sleep do we need？New﹣born babies sleep most of the time.They can sleep 20﹣22 hours a day.Children need 10﹣12 hours of sleep a day.Teenagers need 8﹣ 10 hours of sleep a day because they need lots of energy to grow into their adult（成人的）bodies.Grown﹣ups usually need 6﹣8 hours of sleep to keep active.
（3） That is why old people sleep less than young people.
Interesting facts
Almost everyone has their dreams while they sleep，but not all of them can tell their dreams clearly when they wake up. （4） More surprisingly，some may even get up in their dreams and walk around.This is called "sleepwalking".Are you a sleepwalker？Or，is there a sleepwalker around you？
（5）
It's not just people that love to snooze（打盹）.In fact，many animals have unusual or surprising sleeping habits.Some animals，such as bears and hedgehogs，sleep all through winter.The swift is a very fast bird that can sleep while it flies!Cute koalas sleep around 18 hours a day.Giraffes don't need much sleep at all.They usually sleep standing up.
A.Sleepy animals B.Why do we need sleep？ C.Some people talk in their dreams. D.However，the real reason is probably that we don't have enough sleep. E.The older you get，the less sleep you will need. F.Some people never dream while they sleep. G.Clever animals |
There are about 80,000,000 mines* under the ground in more . than 60 countries. It is difficult and dangerous to clear these rnines, About 50 people including many children were’ killed ‘or htirt each iay. In 2003, APOPO, a Dutch research com pan y that uains the an imals, came up with the-idea of s\ng rats to search for the mines.
The animal trainers ‘found that a kind of rats from Africa were clever and had.a sharp* sense of smell. The rats were about 75 cm long and.weighed about l.35 kg, light enough to run across a minefield without setting off the mines.
In January 2004, the APOPO started this project. First, the trainers let the 4-week-old baby rats get familiar with humans. A few weeks later, the rats were no Ionger afraid of people and ‘the things around them. Then they were trained to connect a click* sound with food. After the rats had leamed that, the trainers then taught them to tell the difference between the smell of mines and other smells. When the rats could do it, the click was sounded and they were given a bit of banana. The method was called clicker training. “The training isn’t easy, said trainer Abdullah Mchomvu. “You have to be patient. Sometimes I get angry, but then again, I tell myself these are animals.”
After nine months’training, the rats were taken to a minefield. They’ran across the minefield, stopped, sat and scratched the ground to tell the deminers* that they smelt out’a mine. Then the mine was cleared. It had taken two ‘deminers a day to clear a 200㎡ . minefield, but with the help of two rats ‘they could finish it in two hours.
The rats and the deminers saved thousands of lives, “The rats did this job much better than we expected. So far they have helped to make almost 2,000,000㎡ of land safe. They are heroes,” said Bart Weeqens, the head of the APOPO. The APOPO trained the rats to search for .
| A．children | B．animals | C．mines | D．bananas |
While training the rats, the trainers have to be
| A．patient | B．clever | C．brave | D．serious |
How long did the training last?
| A．Two hours. | B．One day. | C．Four weeks. | D．Nine months. |
Which of the following is NOT TRUE according to the passage?
| A．Each day about 200 people were killed or hurt by mines, |
| B．The APOPO started to train the rats in January 2004. |
| C．The trainers gave the rats food after they smelt out a mine. |
| D．The rats and the deminers saved thousands of lives. |
What will the house of the future look like? Could it have gardens on its walls, or a pool with fish for dinner? Architects believe that they are all possibilities. The only thing for sure is that the houses will be as green as possible.
The tree house
Many architects in the world would like to build a “tree house.” Like a leaf, the surface of the house collects sunlight during the day. The energy can be used to heat water, produce electricity, and even create fresh air for the home. The “root” (根) of the house is deep under the ground. It uses the soil (土壤) to the home’s temperature.
The Lizard house
Like a lizard (蜥蜴), changing color with the weather is the most important design of a lizard house. When it’s in the bright sun, the cover of the house will turn dark to protect it from strong heat. During dark days, it turns white and takes in as much light and heat as possible to produce energy.
Meals at home
This design is perhaps as much about the future of food production as architecture (建筑风格). It has gardens on the outside wall of the house. People can plant tomatoes, carrots and green tea on them. So every day in the morning, you just need to walk outside and collect your meals.
Learning from the past
Looking to the future isn’t the only way to be green. Sometimes, ancient techniques (古老的技术) can also help cut down energy use. For example, a chimney (烟囱) can be a useful air conditioner because it is easier of hot air to flow out at the chimney.What is the best title (标题) of the passage?
A. Green house of the future.
b. The greener, the better.
C. How to build green houses.
D. Changes of the houses.We can heat water, produce electricity or create fresh air for the home .
A. with the root of a leaf.
b. with the energy from sunlight.
C. with the soil under the ground
D. with gardens on its walls.What will happen to the cover of the lizard house when it’s in the bright sun?
A. It will take in light.
b. It will produce energy.
C. It will turn dark.
D. It will turn white.The passage seems to tell us that meals at home in the future .
A. will be more delicious.
b. need more cooks.
C. cost as much as possible.
D. will be greener.A chimney can be a useful air conditioner but it used to cause .
A. pollution. b. accident. C. noise. D. techniques.
Do you play a musical instrument? If so, you may be getting smarter. A recent study shows that taking music lessons can raise a person’s IQ.
Scientists studied 132 children in Canadian schools. At the beginning of the school year, these children took an IQ test. Then they were divided into four groups. One group took singing lessons. Another group took weekly piano lessons. The third group took classes in drams(戏剧). And the last group did no special activities at all.
At the end of the school year, the 132 children took an IQ test again. In all four groups, the average score went up. However, the piano players’IQs went up 7.0 points on average. The average increase for the other three groups was only 4.3 points.
The researchers say that the difference is small and it may not result in better grades for the piano players. However, they still consider the results important. Learning an instrument helps kids becomes better at concentrating and at memorizing things. Therefore, the researchers say, it may be good for brain development in young people.
If you have a chance to learn to play a musical instrument, never miss it. Remember it can make you smarter. Which of the following is NOT true of the study?
| A．It was done in Canada. |
| B．It was done by some musicians. |
| C．It included four groups of children. |
| D．It took one school year to complete. |
Which of the following is true?
| A．Average IQ scores increased in all the groups. |
| B．Only the piano players’ IQs increased. |
| C．The average increase for all four groups was 4.3 points. |
| D．Most of the children’s IQs did not go up. |
The underlined word “they” in the passage refers to ______.
| A． better grades | B．piano players | C．researchers | D．instruments |
What’s the main idea of the passage?
| A．It’s good for us to listen to music. |
| B．Everyone should learn to play the piano. |
| C．Take an IQ test before you learn instruments. |
| D．Learning instruments may make kids smarter. |
As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success. 
Scientists have found out that the radiation（辐射） is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won’t be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far.
Space rubbish is also thought to be a great danger to spacemen. It’s reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion（爆炸）in space in 1999 made a cloud of 300,000 fragments, each at least 4mm in size. A small piece of these even knocked a spaceship window and caused some damage（损坏）.
Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth. In the near future, it may become possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment. ______ shows the man-made things in space in the correct way.
| A． | B． | C． | D． |
The radiation from the sun and other stars is ______ to spacemen.
| A．good | B．helpful | C．useful | D．harmful |
The underlined word “fragments”means “______”.
| A．碎片 | B．泡沫 | C．烟雾 | D．飞碟 |
The passage talks about _________ kinds of danger in space.
| A．two | B．three | C．four | D．five |
Which of the following is TRUE?
| A．Scientists have found out ways to solve any problem in space. |
| B．Every one of us can have a travel to space in ten years. |
| C．The harm of the radiation may be found in the spacemen’s children. |
| D．Space is really dangerous, so it doesn’t interest anyone on the earth. |
People didn't pay much attention to their health in the past，but now more and more people try to make sure that they are healthy.（1）
Do exercise every day.There are many ways to do exercise in daily life.（2） Some people think that doing simple things like cleaning the house is helpful.Other people think that doing exercise such as running or playing ball games is good.
Eat healthy food.It is good for your health to eat healthy food.You should eat more vegetables and fruits but less junk food every day. （3）
（4） Today many people have stress （压力）in their life，but we should try to relax ourselves.In fact，you can never keep yourself away from stress in life. （5） So you need to know the reason for the stress and find ways to feel better.Thinking about things in an active way can also reduce stress.Try to live for now，and don't worry about the future.
A.Pick up a hobby.
B.It is always with you.
C.Learn to relax yourself.
D.It's bad for your health to sit for a long time.
E.Now let me tell you some ways to keep healthy.
F.People have different ideas about ways to exercise.
G Healthy food plays an important role in a strong body.
Every time you turn on the television or take a ride in a car ,you could be adding to a problem called acid rain(酸雨). In this article, you’ll learn how acid is created, and how it affects us, and more importantly, what we all can do to prevent it.
How is acid rain created?
When people use fuels(燃料), such as coal and gasoline, poisonous gases are give off. When these gases mix with rain, acid rain forms. Many power stations burn fuels in order to creat the electricity(电) that we use in our homes and offices every day. Cars and trucks also send these gases into the air when they burn gasoline .When rain mixes with these gases, harmful things called acids form. This is acid rain.
How does acid rain affect us?
Acid rain damages(毁坏)everything that it touches. It poisons our rivers, ponds, lakes, and oceans along with all the life in them. It pollutes our soil and crops, harms trees, and can even kill fish and plants. Acid rain also eats away at buildings.
How can we prevent acid rain?
We need to cut down on the pollution that gets into our air. Turn off lights, television, and other electrical appliances if you are not using them, Walk or take a bike whenever possible. If you are travelling a long distance, take a bus or train to save fuel.
As research shows, acid rain harms our environment. But people everywhere can take small steps now to help protect our environment for future generations.When power stations burn fuel,_______.
| A．acid rain form | B．air pollution is caused |
| C．noise pollution is caused | D．acid rain gets heavier |
According to the article, acid rain affects us _______.
| A．suddenly | B．slightly | C．seriously | D．immediately |
What advice does the article give us?
| A．Go to school on foot or by bike if we can. |
| B．Go to bed earlier in order to use less electricity. |
| C．Travel by bus to prevent acid rain. |
| D．Turn off the television on rainy days. |
What is the best title of the article?
| A．Preventing Acid Rain | B．Forming of Acid Rain |
| C．Acid rain, Heavy Rain | D．Acid Rain, Killer Rain |
阅读理解
Why do we need to throw less away? There are two reasons. One is that some resources （资源） are nonrenewable （不可再生的） That means there is only a certain amount of that resource in the world . One example of this is oil. When we use up all the oil in the world, there will be no more.
There is another reason for throwing less away. All of our trash has to be put somewhere. Often , it is put into garbage dumps （垃圾场）. Much of that trash will be there for hundreds of years. The dumps will be filled up with all this trash.
There are three ways to cut down on trash.
One way is to recycle. When you recycle something, it means it is made into another shape and used again. Old newspaper may become paper bags. A glass jar can be melted（熔化）and made into a bottle .
Another way to cut down on trash is to reuse things. You can wash and use again a bottle that can hold mustard （芥末酱）or something else .
The third way to cut down on trash is to reduce the amount of trash you make, stop buying thing that you don’t need in the first place. That reduce the amount of the earth’s resources that you use.How many reasons do we need to throw less away?
A. Three B. five C. two When you reuse something, it means .
A. it is made into another shape and used again
B. it is used again
C. it isn’t used any moreAll the ways of cutting down on trash in the passage are to .
A. recycle and reuse things
B. recycles and reduce the amount of trash you make
C. reuse things recycle and reduce the amount of trash you makeIf a broken plastic box is changed into a plastic ruler , the way is to .
A. recycle B. reuse C. reduce The word “reduce” in the passage means .
A. 还原 B. 减少 C. 增加
I travel a lot.Each month，I pack up my suitcase to hit the road，whether it could be by plane，train，or automobile.I always find myself with the same problem—how to stay healthy while traveling？ （1）
1.Move around.
Though only about 1 in 4，500 airplane passengers develop a blood clot（血块），you should still make efforts to move around on the plane，just standing in the aisle or by taking a walk to the toilet.Have a layover（中途停留）？Instead of sitting，make sure to walk around the airport.Taking a road trip？Make plenty of stops to move around.（2） Whether it is working out at your hotel，taking hikes，or giving up public transport to walk，you'll feel much better if you get in some activity.
2.Prepare snacks smartly.
（3） Though these seem like a convenient choice，they're not the healthiest.I like to pack snacks that are within my calorie budget for the day and 100 calories or under each.When traveling and buying food，I try to choose fresh fruit and vegetables.Is fast food the only choice if you're very hungry？Stick to something simple and whatever you do，don't supersize.
3. （4）
Because of low humidity on planes，many of us can find ourselves feeling thirstier than ever.Drink more water.Make sure when traveling on day trips to carry water with you at all times. （5） As a result，you will eat more healthily throughout the day.
A.Eat，eat，eat. B.Drink，drink，drink. C.Here are some practical tips. D.Once you get to your location，don't forget to do exercise. E.Water will also help you to be able to stay full between meals. F.While at the airport or on road trips，you'll pass countless fast restaurants. |
Laboratory work is your chance to learn science firsthand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson.
LABORATORYRULES
Throughout the lesson
·Do not enter the science lab without the teacher’s permission.·No food or drinks are to be alowed in the science lab.
Before the Experiment
·Read al instructions carefuly before every experiment.
·Prepare al apparatus（仪器）and arrange them so that you wil not knock them over while doing the experiment.
During the Experiment
·If you are unsure of how to use any apparatus or how to operate, ask your teacher for help.·Never smel or taste chemicals unless your teacher gives permission.
After the Experiment
·Wash al apparatus after use and return them to the places where they were.
·Throw waste materials in proper waste baskets.
First Aid
·Report al accidents to your teacher immediately.
·If you spil（ 溅 出 ）any chemicals onto your body or clothing, wash with plenty of water and report to your teacher. Your teacher wil probably tel you the rules above _____ the first lab lesson.
| A．before | B．since | C．during | D．after |
Before every experiment, you should _____.
| A．taste the chemicals first |
| B．clean al the apparatus |
| C．read al instructions carefuly |
| D．report al the accidents to the teacher |
When you are not sure how to use al apparatus, _____.
A. try them on your own
B. read the rules carefuly
C. ask your teacher for help
d. put them back It is clear that you can _____.
| A．bring food into the lab |
| B．enter the lab anytime |
| C．smel chemicals as you like |
| D．learn science directly in the lab |
If you get chemicals on the clothing, you can find ways to solve it in the part _____.
| A．Before the Experiment |
| B．First Aid |
| C．During the Experiment |
| D．After the Experiment |
Tony: These days, the word “clone” has appeared very often in the newspapers. Do you know its meaning?
Lana: I read a report. It said that Dr. Ian Wilmut successfully cloned a lamb* named Dolly from a grown-up sheep. So people call him the “father” of Dolly.
Tony: In fact, the word “clone” means to produce the “same” animal by taking cells* from a
grown-up one. I think, if we know how to do cloning, we need only to keep a small number
of sheep, cows or horses.
Lana: What’s more, these days some people even want to clone humans. They have asked: Can we
clone ourselves?
Tony: It seems interesting. But do you think it possible to do that?
Lana: No, impossible! First, I think we cannot clone a dead person, because the cells in his body are dead already.
Tony: Then can we clone a living person?
Lana: Again no! You might clone yourself one after another, but it is only a copy, not a real you. It is only something, not a “human”.
Tony: Well, you mean that it is not a real human.
Lana: True enough! I think Dr. Wilmut would most like to make better animals, and it has nothing to do with human cloning.The word “clone” means_________________.
复制 B 克隆 C 抄袭 D 制造Dolly was the name of _______.
A. the father of a sheep B. a famous scientist
C. . a grown-up sheep D a sheep that was cloned Lana says Dr. Ian Wilmut is the “father” of Dolly. Here, she means __________.
Dr. Ian Wilmut was the first man to clone a sheep in his lab
Dr. Ian Wilmut gave Dolly a new life
Dr. Ian Wilmut took care of Dolly like a father
D. Dr. Ian Wilmut has a daughter whose name is Dolly From the conversation, may be clone in our life.
A a tree B a person C an elephant D an orange According to the conversation, we know about .
Scientists have successfully cloned humans.
Dr. Wilmut likes to do human cloning.
C. Cloned animals are better than humans.
D. Lana doesn’t think humans shouldn’t be cloned.
The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are small and light and you do not need much space for them. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can only buy telephone cards, and some cards cost up to ￡4,000.The first Japanese card has a value of about ￡28,000. Most people only see cards with prices like these in their collectors’ magazine. When were the first Italian telephone cards produced?
How many countries can produce telephone cards now?
Where can we find a market to buy telephone cards?
What is the price of the first Japanese telephone card?
In which magazine do most people see cards with prices?
阅读理解
Today almost everyone knows computers and the Internet. If I ask you “What is the most important in your life?” maybe you will say “Computers and the Internet.”
The first computer was made in 1946. it was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer has said, “People can’t live without computers today.”
The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, writer letters, do shopping, play computer games or make friends.
Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages, and even sex. They are so interested in making the “unreal friends” that they can’t put their hearts into study. Many of them can’t catch up with others on many subjects because of that.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet. The Internet can not be used for______.
| A．studying | B．shopping | C．thinking | D．playing |
When the computer was invented, it was______.
| A．large and worked quickly | B．small and worked slowly |
| C．large but worked slowly | D．small but worked quickly |
The Internet was born in about________.
| A．1960 | B．1970 | C．1980 | D．1985 |
Which of the following is TRUE?
| A．Few students like going into the Internet. |
| B．Students use the Internet to make “unreal friends.” |
| C．These “Unreal friends” often meet each other |
| D．Students know the friends on the Internet very well |
What does the writer think of the Internet?
| A．It is wonderful |
| B．It can make students study harder |
| C．It is not good for students |
| D．It is helpful, but we can’t do everything on it. |
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