In today's world, almost everyone knows that air pollution（污染）and water pollution are harmful to people's health. However, not all the persons know that noise is also a kind of pollution, and that is harmful to human health, too.

   People who work and live under noisy conditions usually become deaf（聋）. Today, however, scientists believe that 10 percent of workers in Britain are being deafened by the noise where they work. Many of the workers who print newspapers and books, and who weave（织）cloth become deaf. Quite a few people living near airports also become deaf. Recently it was discovered that many teenagers in America could hear no better than 65-year-old persons, for these young people like to listen to pop music and most of pop music is a kind of noise. Besides, noise produced by jet planes or machines will make people's life difficult and unpleasant, or even make people ill or even drive them mad.

   It is said that a continuous noise of over 85 decibels（分贝）can cause deafness. Now the governments in many countries have made laws to control noise and make it less than 85 decibels.

   In China, the government is trying to solve not only air and water pollution problems but also noise pollution problems.

1. The text is mainly about _________ .

　 A. air pollution                        B. noise pollution   

C. water pollution                       D. world pollution

2.According to the text, a continuous noise of _______ decibels can make people deaf.                                                                

　     A. less than 85                         B. less than 65        

C. more than 85                          D. about 65

3.10 percent of the workers in Britain are being deafened because_______________ .

    A. they are too busy to listen to others' talk

  B. they often listen to pop music

    C. they live near airports         

D. they are working in noisy places  

4.The government of China is trying to solve ____________ .

　 A. air, water and noise pollution       

B. only air and water pollution

C. only water pollution               

D. only air pollution 

Ears are for hearing — everyone knows that. But for a creature called the Cuvier’s beaked whale, hearing starts in the throat (喉咙), a new study found.
The observation might help explain how all whales hear. The work might also help scientists understand how animals are affected by underwater sonar (声呐). This sonar, used by some ships, sends out sound waves to locate underwater objects.
The Cuvier’s beaked whale is a so-called toothed whale. Toothed whales dive deep into the ocean in search of food. As the whales hunt, they produce sounds that reach objects and then return to the whales. This allows the animals to “see” the shape, size, and location of objects, even when they’re 1,000 meters under the sea, where it is totally dark.
To better understand how the whale hears, researchers from San Diego State University in California took X rays of two Cuvier’s beaked whales. The whales had died and washed up on the beach.
Ted Cranford and his colleagues used the images to make a computer model of a Cuvier’s beaked whale’s head. Then, they modeled the process of sound traveling through the head.
The researchers knew that some sounds get to the ears of a toothed whale through a structure (构造) called “the window for sound”. Found on the lower jaw, this structure is very thin on the outside and has a large pad (垫) of fat on the inside.
When the researchers used their computer model to work out how sound waves travel in the whale’s head, they were surprised to find that sounds coming from right in front of the whale actually travel under the animal’s jaw. From there, sound waves move through the throat, into a hole in the back of the jaw, and finally to the pad of fat near the animal’s ears.
69. 【小题1】Toothed whales look for food under the sea by ______.

Louis Pasteur, one of the world's great scientists, was born in 1822, and died in 1895.While still a young boy, Louis Pasteur made his decision to become a scientist. He spent much of his life time studying the diseases of cattle, chickens and other tame animals. His wife learned to help him with his work. Almost everyone knows that Pasteur is the man responsible for finding a way of preventing milk from spoiling (变质). Not many people know he was the first to imagine and to prove that air we breathe is full of germs. One of his greatest successes was finding a treatment for people and animals to prevent a disease called rabies (狂犬病). Louis Pasteur won many honors and could have got large amount of money. But Pasteur preferred to live simply. The real happiness of this unusual man came from his work. Louis Pasteur did so well in his life that the French government took up his work and created the Institute Pasteur in the year 1888.

According to the passage, which of the following statements is true?

A. Pasteur was a scientist and doctor as well.

B. Pasteur lived for less than seventy years.

C. Everybody knows that Pasteur succeeded in finding a way of preventing milk from spoiling.

D. Pasteur's wife was of some help to him in his work..

From the passage, we know that Pasteur lived a simple life. This is because ________.

A. he earned little money.                   B. he cared much about money.

C. what he really enjoyed was a simple life.     D. of all mentioned above.

Why were many honors given to Louis Pasteur?

A. Because he was the greatest scientist in the world.

B. Because he spent much of his life time studying the diseases of people .

C. Because he lived simply.

D. Because he was a rare success as a scientist.

Pasteur could have got large amount of money if he had___________.

A. cared much about it.       B. made more discoveries.

C. lived a better life.          D. achieved more successes.

To Louis Pasteur the real happiness in his life was to __________.

A. study                    B. work  

C. get large amount of money   D. raise tame animals

A rat looked through a crack in the wall to see the farmer and his wife opening a package. What food might it contain? But he discovered that it was a rattrap (捕鼠夹）.

Going back to the farmyard, the rat started to give a warning.

The rat turned to the pig and told him：“There is a rattrap in the house, a rattrap in the house!”

‘Tm sorry，Mr. Rat，” said the pig，“I can only say this is something terrible to you, but it is of no influence to me. I cannot be bothered with it.”

The rat turned to the cow. But the cow said，“Like wow，Mr. Rat? A rattrap? I am in danger, Huh?”

The rat returned to the house, head down and dejected. So the rat had to face the farmer's rattrap alone.

That very night, a sound was heard throughout the house，like the sound of a rattrap catching its prey (猎物）The farmer's wife rushed to see what was caught. In the darkness，she did not notice that it was a poisonous snake whose tail had been caught by the trap. The snake bit her.

The farmer rushed her to hospital. She returned home with a fever. Everyone knows that a fever could be treated with fresh chicken soup, so the farmer took his knife to the farmyard for the soup. However, his wife's sickness continued.

The farmer's friends and neighbors came to sit with her around the clock. To feed them, the farmer killed the pig. But she didn't get well. Finally, she diedand so many people came for the last sight that the farmer had the cow killed to provide meat for all of them.

So the next time you hear that someone is facing a problem and think that it does not concern you, remember that the whole farmyard is at risk when there is a rattrap in the house.

1.From the passage we know that______.

A．the pig helped the rat get rid of the trap

B．the cow strongly believed in what the rat said

C．no animals showed concern over the rat's warning

D．the snake was killed immediately after being caught

2.The underlined word ‘‘dejected” is the closest in meaning to______.

A．disappointed       B．surprised          C．determined        D．excited

3.We can learn from the article that_____.

A．the farmer had planned to kill the rat

B．the rat was very wise in avoiding the trap

C．the farmer's wife got good treatment in hospital

D．the rat had expected what would happen to the pig and cow

4.What message does the story intend to pass?

A．We should mind our own business.

B．Everything is related to something else.

C．We'd better treat animals in a friendly way.

D．The farmer couple and their friends are all foolish.

Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. It makes your heart and body strong. Children who often exercise are more alert (灵活). This means they do better in tests and schoolwork than those who don’t exercise.
There are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you exercise in the following ways; you have to like what you’re doing. Exercise enough— but not too much. It’s best to exercise twice each week, Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for you.
You can exercise at fitness centers. They have a lot of equipment（设备）there. The equipment will help to exercise your arms, legs and other parts of your body to make you fit. Some people buy equipment for their homes. But it is very expensive.
Exercising can be fun. Friends can exercise together at a fitness center or they can play sports together. How do you exercise?
【小题1】In the text, the writer tells us that we all need to         .