Forests have always been useful and important to men who make use of them in many ways. Every day trees are serving man everywhere. Trees supply man with fruits and building materials in the form of wood. Without trees it would be impossible to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds is made of wood. Trees can stop man from the terrible heat. They’re also useful in preventing(阻止) good and rich top soil from being washed away during heavy rains. If there were no forests, heavy rains would wash away the rich surface(表层) soil that is so important to plants. The result is that the land will become a desert. There are plenty of desert areas in the world. A long time ago these desert areas used to be very rich areas, but men in the past had no enough knowledge about science of nature, and they cut down too many trees in the area where they lived and never planted new ones. By and by, the rich surface soil was blown and washed away by strong winds and heavy rains. In the end the rich land changed into useless deserts where nothing could grow.
根据短文内容，判断正（T）误（F）。
1.Trees are not serving man everywhere.
2.Without trees it would be possible to build houses, boats, bridges and so on.
3.Trees can stop man from the terrible heat.
4.There are few desert areas in the world.
5.In the end the rich land changed into useless deserts where nothing could grow.
Now satellites(卫星)are helping to forecast(预报)the weather. They are in space and they can reach any part of the world.The satellites take pictures of the atmosphere(大气), because this is where the weather forms(形成)。They send these pictures to the weather station. So meteorologists(气象专家)can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change.
Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures,the meteor- ologists compare(比较)them with earlier ones. Peerhaps they may find that the clouds have changed during the last few hours .This may mean the weather on the ground may soon change,too. In their next weather forecast, the meteorologists can say this.
So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for 3 or 5 days. Soon,perhaps , they may be ablet to forecast the weather for a week or more ahead(提前)Satellites travel__________.
A in space B in the atmosphere
C above the ground D above spaceWhy do we use the weather satellites to take pictures of the atmosphere? Because___________.
A the weather satellites can do it easily
B clouds form there
C the weather forms there
D the pictures can forecast the weather Meteorologists forecast the weather________.
A when they have received satellite pictures
B after they have compared new satellite pictures with earlier ones
C before they receive satellite pictures
D while they study satellite picturesMaybe we’ll soon be able to forecast the weather for _______.
A one day B two days C five days D seven days or even longerThe main idea of this passage is that satellite are now used in______.
A taking pictures of the atmosphere
B receiving pictures of the atmosphere
C doing other work in many ways
D weather forecasting
Have you ever seen snow? Many people in the world have not. Some countries never have snow; some have only a little on the tops of very high mountains. In the north of England, there is quite a lot of snow every winter, but in the south of England, there is usually little.
When a student from a warm country comes to England in autumn for the first time, he feels cold at first. There are often dark clouds, grey sky and cold rain in England in autumn, and most students from warm countries do not like this.
But snow is different. Though it is cold, it is also beautiful. Perhaps, after several dark mornings, the student wakes up one day, and there is a lot of light in his room. He thinks “Is it so late?” and jumps out of bed. But no, it is not very late. He looks out of the window and there is the snow on the ground and on the houses and everywhere. The light of his room comes from clean, beautiful snow.In which part of England is there much snow in winter?
| A．In the east. | B．In the north. |
| C．In the west. | D．In the south. |
In the autumn of England, we can NOT often see __________.
| A．grey sky | B．dark clouds |
| C．strong winds | D．cold rain |
Why does the student ask himself “Is it so late?”
| A．Because he has some work to do. |
| B．Because it is bright in the room. |
| C．Because it is really late. |
| D．Because he usually gets up early. |
Which of the following statements is true?
| A．Every country in the world has snow in winter. |
| B．Foreign students like the weather in England. |
| C．It is often very warm in the autumn of England. |
| D．Many people in the world haven’t seen snow. |
Can plant eat people? Probably not. But there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meat- eating plant is the Venus flytrap(捕蝇草).
The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of the book.. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly(苍蝇) touches one of the hairs, the leaf closes very quickly. Then the fly can’t go out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly. Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn’t have all the important things, especially nitrogen(氮). Animal meat has a lot of nitrogen. So some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea.
根据短文内容判断。
1. The Venus flytrap grows in wet parts of the United States.
2. The Venus flytrap is a kind of plant.
3. The underlined word “presses” probably means（挤、压） in Chinese.
4. In the world, many animals eat plants but plants never eat animals.
5. From the passage, we know that not only animals eat plants, but also some plants eat animals.
Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses（脉搏）went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.During REM sleep, a person’s breathing and heartbeat ________.
| A．stop | B．increase | C．decrease | D．stay the same |
Which word in paragraph（段落）3 means “colorful and lively”?
| A．easier | B．empty | C．vivid | D．quickly |
Which paragraph tells what happens when people don’t get enough sleep?
| A．1 | B．2 | C．3 | D．4 |
What is the main idea of the article?
| A．REM sleep helps the brain grow. |
| B．REM sleep has been watched and recorded by scientists. |
| C．REM sleep is a time to empty the day’s garbage. |
| D．REM sleep is an active time when the body is hard at work. |
You can decide from the article that REM sleep ________.
| A．has a restful effect on people |
| B．can be avoided with lots of sleep |
| C．is something that all people experience |
| D．is something that all scientists agree on |
What makes 15,000 men and women run for hours, and what makes them run through the streets on a cold day without coats? I was one of those runners. The race is called marathon (马拉松).
I had never run more than eight miles before, and here I was training. Since the race is in April, I had to run throughout the winter, and in Boston, winters are cold. For most people, just putting on their shirts, sweaters, jackets, and hats is exercise enough. I found myself out on the dark streets, running along ice sidewalks (人行道). Even in gloves, my fingers got so cold that they looked like red carrots. My nose didn’t get warm until lunchtime !
Finally, the big day arrived. The weather was cold, with ice and rain. Bang! The gun sounded, and we started. I didn’t go anywhere at first because I was standing behind so many people. I had to wait for them to move.
At first, the running was easy. The other runners just seemed to pull me along. Somewhere around the 20-mile mark I even said to myself, "This is nothing, why did I train so hard?"
Then I hit "the wall". "The wall" is what marathon runners call the special point. I knew my body reached the point and I thought I couldn’t go any more. I was out of breath and my legs turned into pieces of wood. I was almost falling down. I can’t remember anything about the last five miles of the race.
I kept running though. At last, I heard a voice at the finishing line.
"You look good," my friend Ted said. "How did it feel?"
"Wonderful !" I replied.
For everything, if you devote yourself into it, there will be a way. I finished the race, at least, in my heart, I was the winner.Which one best describes the weather on the race day?
| A．Cold and rainy. | B．Cold and sunny. | C．Dry and cloudy. | D．Wet and foggy. |
How did the writer feel about the race during the first 20 miles?
| A．Difficult. | B．Boring. | C．Easy. | D．Interesting. |
According to the article, what must someone do to prepare for a marathon?
| A．One must eat certain food and get plenty of sleep. |
| B．One must be willing to eat, sleep, and train twenty-four hours a day. |
| C．One must run along ice sidewalks every day. |
| D．One must be willing to train a lot and doesn’t give up easily. |
Then I hit "the wall". What do you think "hit the wall" means here?
| A．撞击墙壁 | B．到达极限 | C．抵达终点 | D．中途加速 |
Do you know why different animals or pests (昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.
Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.From the passage we learn that locusts________.
| A．are small animals | B．are easily found by birds |
| C．are dangerous to their enemies | D．change their colors to protect themselves |
How can pests with different colors from plants keep out of danger?
| A．They run away quickly. | B．They have the colors much like their enemies. |
| C．They hide themselves by day and appear at night. | D．They have to move quietly. |
Bears and lions can keep safe because _________.
| A．they have the colors much like the trees | B．they move quietly |
| C．they like brown and gray colors | D．they live in forests |
Why can the kind of fish live up to now?
| A．Because it is very and strong. |
| B．Because the liquid it sends out can help it escape from its enemies. |
| C．Because the liquid it sends out can kill its enemies. |
| D．Because it swims faster than any other fish. |
Which is the best title for this passage?
| A．The Change of Colors for Animals and Pests | B．Colors of Different Animals and Pests |
| C．The Main Use of Colors for Animals and Pests | D．Some Animals and Pests |
Whenever the sun dropped and the blue sky came up, my father and I used to climb the mountain near my house. Walking together, my father and I used to have a lot of conversations through which I learned lessons from his experiences. He always told me, “You should have goals like climbing the mountain.” Without the mountain-climbing that we both enjoyed, we couldn’t have enough time to spend together because my father was very busy. I really got a lot from the mountain-climbing. It gave me time to talk with my father and to be in deep thought as well as develop my patience.
Once we climbed a very high mountain. It was so challenging for me because I was only ten years old. During the first few hours of climbing, I enjoyed the flowers and trees, and the birds’ singing. But as time passed, I got a pain in both of my legs. I wanted to quit climbing, but my father said to me, “You can always see a beautiful sky at the top of the mountain, but you can’t see it before you reach the top. Only there can you see all of the nice things, which is just like your life.”
At that time, I was too young to understand his words. But later after that, I got to know the meaning of hope in life. I found myself standing at the top of the mountain, and the sky was as clear as crystal.The passage tells us that mountain-climbing was ______ for the father and the son.
| A．hard | B．enjoyable | C．painful | D．comfortable |
The underlined word “crystal” in the passage means _______.
| A．岩石 | B．火焰 | C．水晶 | D．寒冰 |
Which of the following is the closest in meaning to the father’s words in the second paragraph?
| A．You will get all you need at the top of the mountain. |
| B．The sky is always as clear as crystal. |
| C．You can find life is full of nice things. |
| D．Never give up half-way. |
We can infer(推断) from the last paragraph that ______.
| A．the writer was very successful in his life |
| B．the writer reached the top of the mountain |
| C．though the writer was young, he could understand his father |
| D．the writer used to stop half-way when he climbed the mountain |
The best title for the passage is ______.
| A．Reaching the Top of the Mountain | B．Standing at the Top of the Mountain |
| C．Conversations between Father and Son | D．How to Get to the Top of the Mountain |
There are some easy things you can do to protect the environment and the earth. Choose ideas from the list or come up with a few of your own.
·Plant flowers, grass or trees.
·Whenever you visit a park or beach, take away what you bring there—keep rubbish in a bag until you can put it in a dustbin.
·Turn off the lights and TV sets when you leave the room. This can save a lot of electricity.
·Turn off the tap when you brush your teeth. You can save some water by not letting it run. Also, use a glass cup instead of a paper cup because this saves paper.
·Keep the doors and windows closed in winter to keep warm air in.
·Give your old books and magazines to a library instead of throwing them away.
·Give your old clothes to poor children you know instead of throwing them away.
·Use both sides of paper.
·Stop pouring dirty water into the rivers or lakes nearby.
·Encourage all your friends to do the same things you do to help protect the earth. You don’t have to wait until Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the environment, the world will become much more beautiful.From the above, we know that this is .
A. a sign B. a proposal (倡议书) C. an ad(advertisement)The writer tells us .
A. that we can’t do all these things until Earth Day
B. to pour dirty water into the rivers
C. to save water by not letting it run while brushing our teeth We can to save paper.
A. use a paper cup B. use both sides of paper C. give new books to a libraryWhich of the following is wrong according to the writer?
A. Turn off the lights when you leave the room.
B. Close the doors and windows in winter.
C. Use a paper cup when you brush your teeth. What’s the best title of the passage?
A. Protect the Earth B. Save Money C. Make Better Use of Old Things
Germs(细菌) are everywhere. You can’t see them, but they are on your desk, on your computer, and even in the air!
Like people, germs move around the world. They fly with us on planes. When food, clothes, and other things travel around the world, germs travel, too. Some germs are safe, but some are dangerous. Germs cause illnesses like colds and the flu.
Warmer Weather Brings Germs
The world’s weather is changing. Cooler countries are getting warmer, so insects from hot countries can move there. Some of these insects, like mosquitoes, carry dangerous germs. These germs cause headaches, fever, and can even kill people.
Under Your Skin
Your skin protects you from germs. It stops some germs, but not all. They can enter your body when you eat, or when you have a cut. Germs are on your hands, too. They enter your body when you touch your eyes, nose, or mouth.
Fighting Germs
Your immune system(免疫系统) protects you, too. When germs get inside your body, your immune system finds and kills them. Special cells(细胞) move around your body and fight germs. They help you stay healthy. Other cells make antibodies. Antibodies help your body find and stop germs.
What can you do to fight germs? You should wash your hands with soap and water. Soap kills many germs, and water washes them away. According to the text, insects ______.
| A．kill germs | B．carry germs | C．protect germs | D．love germs |
The underlined word “there” refers to ______.
| A．cooler countries | B．hot countries | C．everywhere | D．the world |
Which of the following is right according to the text?
| A．All germs are dangerous. | B．There are more germs in cold places. |
| C．Soap can kill all germs. | D．Germs can get into your body. |
What do antibodies do?
| A．They kill germs and wash them away. | B．They find and develop germs. |
| C．They help protect us from germs. | D．They carry dangerous germs. |
Which can be the best title for this text?
| A．Germs Are Everywhere | B．Weather Is Changing |
| C．Skin Stops Germs | D．Germs Are Developed |
The population of the Earth is growing faster. It is important that we look after the Earth. We need it! The Earth gives us a lot of things. We also give the Earth a lot, but some of the things are not good.
In nature, when something dies, other animals and plants get food from it. Every animal or plant gives food for other animals or plants. However, animals can’t get food from many of the things that we ‘give’ the Earth. Animals and plants can’t eat metal, plastic and glass. These things will stay in the ground for many, many years.
Some rubbish is very dangerous for plants and animals. In some places, many animals live together. One animal makes food for many more animals. If we put rubbish and chemicals in the water, the plankton(浮游生物) can die. If there isn’t any plankton, many animals have nothing to eat.
So what can we do? Don’t leave any rubbish in the countryside! Don’t make so much rubbish!The Earth gives us ___________.
| A．food | B．rubbish | C．chemicals | D．pollution |
When something dies in nature, _________.
| A．water and grass are polluted | B．plastic and wood become food |
| C．other animals and plants get food | D．metal and glass stay in the ground |
We must _______ to look after the Earth.
| A．put metal in the ground | B．use more wood |
| C．keep frogs in the water | D．make less rubbish |
We know that many animals do not stay in one place. Birds,fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily,but others move to get away from places that are too crowded.
When cold weather comes,many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration（迁移）is probably the migration of the fish which is called “salmon”.This fish is born in fresh water but it travels many miles to salt water.There it spends its life. When it is old,it returns to its birthplace in fresh water. Then it gives birth and dies. In northern Europe, there is a kind of mouse. They leave their mountain homes when they bccome too crowded. They move down to the low land. Sometimes they move all the way the seadide,and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of kind of lobster（龙虾）.Every year, when the season of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody know where they go.
So,sometimes we know why humans and animals move from one place to another,but at other times we don’t. Maybe living things just like to travel..Most animals move from one place to another at a certain time to _____
A.give birth B.enjoy warmer weather C.find food more easilyThe fish called “salmon”spends a long time in____
A.salt water B.rivers C.fresh waterThe mice in northern Europe move when_____
A.they give birth B.the place gets too crowded
C.they haven’t enough food The lobsters move_______.
A.to the fresh water B.at a certain time C.to find more foodWhat is the main idea of the passage?
A.Animals move to find food more easily.
B.The migration of the fish called“salmon”is the most famous migration.
C.Sometimes we know why and how living things move from one place to another,but sometimes we don’t.
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