Scientists from South Korea are trying to convert（转化）sound waves into electricity. The research could lead to charging a cell phone from a conversation or providing energy to the nation’s electricity system generated（产生）by the noise during rash-hour traffic.
“Just as speakers transform electrical signals into sound, the opposite process —turning sound into a source of electrical power — is possible,” said Young Jun Park and Sang-Woo Kim, the joint authors of a new article in the journal Advanced Materials.
Harvesting energy from phone calls and passing cars is based on materials known as piezoelectrics. When bent, piezoelectric materials turn that mechanical energy into electricity. Lots of materials are piezoelectric: cane sugar, quartz （石英）and even dried bone which could create an electrical charge when stressed. For decades, scientists have pumped electricity into piezoelectric materials for use in environmental sensors, speakers and other devices.
Over the past few years, however, scientists have made dramatic advances in getting electricity out of piezoelectric devices. In an experiment, by using sound waves, which at 100 decibels（分贝）were not quite as loud as a rock concert （a normal conversation is about 60-70 decibels）, the South Korean scientists produced a mild electrical current of about 50 millivolts（毫伏）. The average cell phone requires a few volts to function, several times the power this technology can currently produce.
“But the real question is whether there is enough surrounding noise to act as a power source as for a cell phone,” said McAlpine, a leading scientist. A consumer probably wouldn’t want to attend a rock concert or stand next to a passing train to charge his cell phone. The South Korean scientists agree but they expect to get a higher power output as they continue their work.According to the two South Korean scientists, ________.
| A．sound waves can travel faster than electricity |
| B．new materials can send cell phone signals better |
| C．using cell phones adds to heavy traffic in rush hour |
| D．electricity and sound can be transformed into each other |
We know from the passage that piezoelectric materials ________.
| A．can produce electricity when stressed |
| B．are good at changing electricity into sound |
| C．can reduce the noise of passing cars |
| D．have been widely used in phones and cars |
It can be inferred from the South Korean scientists’ experiment that ________.
| A．it is hard to change sound into electricity under current conditions |
| B．it is impossible to make use of loud sound |
| C．the technology has a long way to go to have a practical use |
| D．the technology can power cell phones easily |
What McAlpine doubts about the technology is ________.
| A．the noise pollution | B．the sound resource |
| C．the cost of piezoelectrics | D．the safety of devices |
Research shows that humans switch from selfish to unselfishbehavior when they are watched. Do you?
A picture of a set of eyes on a computer screen can cause achange in the way people act. Even images of eyes on a charity do-nation, a collection box encourages people to be unselfish, becausepeople put more money in a collection box that has a picture of eyeson it than they do when a flower symbol is on the box.
Manfred Milinski from the Max-Planck Institute for Evolutionary Biology in Germany and Bettina Rockenbachof the University of Berlin, the authorsof a new study, found that people actbetter when they are being watched be-cause they feel they will be rewardedfor good behavior. Their report also referred to other research showing thatthis response of behaving well whenwatched is somehowcoded into humans and people respond thisway unconsciously, or without realizing it. 
It is not just humans that act unselfishly when they are beingwatched. A fish called the grooming fish cleans other fish. Whenother fish are around, it is gentler. When no other fish are around, however, the grooming fish bites chunks from the fish it is supposedto be cleaning.
The researchers suggest that the best way to get people to be-have in the correct way is to make them feel watched. This could bethe reason for the success of a famous American army poster. On itwas a picture of an elderly man staring fiercely and pointing, it appeared, to the person who was looking at the poster. Under the picture was the caption " I Want You. " It encouraged hundreds of thou-sands of young American men to join the army during the SecondWorld War to fight the Germans and Japanese. According to the report, why does a person behave better whenhe feels he is being watched?
| A．He does not want to be shamed by others. |
| B．He needs to show he is a good person. |
| C．He desires others to like him more. |
| D．He feels he will receive some social reward. |
The underlined word "coded” (Paragraph 3) is closest in meaning to _________.
| A．hidden | B．programmed |
| C．forgotten | D．leaned |
What is the text mainly about?
| A．It describes changed behavior when observed. |
| B．It details ways to control people's behavior. |
| C．It tells how to make people work harder. |
| D．It discusses different advertising methods. |
According to the text, which of the following statements is true?
| A．People pretend to behave better when they are watched. |
| B．Fish bite other fish in a fish tank when they are alone. |
| C．People donate more money when they feel they are watched. |
| D．Soldiers fought better during World War II because of a poster. |
Where would the study described in the text most likely befound?
| A．In a newspaper. | B．In a scientific journal. |
| C．In an advertising magazine. | D．In a science textbook. |
No one knows for sure when advertising first started. It is possible that it grew out of the discovery that some people did certainkinds of work better than others did them. That led to the concept ofspecialization, which means that people would specialize, or focus, on doing one specific job.
It's take a man we'll call Mr. Fielder, for example. He dideverything connected with farming. He planted seeds, tended thefields, and harvested and sold his crops. At the same time, he didmany other jobs on the farm. However, he didn't make the bricks forhis house, cut his trees into boards, make the plows(犁），or any ofthe other hundreds of things a farm needs. Instead, he got them frompeople who specialized in doing each of those things.
Suppose there was another man we shall call Mr. Plowright. Usingwhat he knew about farming and working with iron, Mr. Plowright in-vented a plow that made farming easier. Mr. Plowright did not reallylike farming himself and wanted to specialize in making really goodplows. Perhaps, he thought, other farmers will trade what they grow forone of my plows.
How did Mr. Plowright let people know what he was doing?
Why, he advertised, of course. First he opened a shop and then heput up a sign outside the shop to attract customers. That sign mayhave been no more than a plow carved into a piece of wood and asimple arrow pointing to the shop door. It was probably all the information people needed to find Mr. Plowright and his really goodplows.
Many historians believe that the first outdoor signs were usedabout five thousand years ago. Even before most people could read, they understood such signs. Shopkeepers would carve into stone, clay, or wood symbols for the products they had for sale.
A medium, in advertising talk, is the way you communicateyour message. You might say that the first medium used in advertising was signs with symbols. The second medium was audio, orsound, although that term is not used exactly in the way we use ittoday. Originally, just the human voice and maybe some kind ofsimple instrument, such as a bell, were used to get people's attention.
A crier, in the historical sense, is not someone who weeps easily. It is someone, probably a man, with a voice loud enough to beheard over the other noises of a city. In ancient Egypt, shopkeepersmight hire such a person to spread the news about their products. Often this earliest form of advertising involved a newly arrived shiploaded with goods. Perhaps the crier described the goods, explainedwhere they came from, and praised their quality. His job was, inother words, not too different from a TV or radio commercial intoday's world. What probably led to the start of advertising?
| A．The discovery of iron. |
| B．The specialization of labor. |
| C．The appearance of new jobs. |
| D．The development of farming techniques. |
To advertise his plows, Mr. Plowright _________.
| A．praised his plows in public |
| B．placed a sign outside the shop |
| C．hung an arrow pointing to the shop |
| D．showed his products to the customers |
The writer makes up the two stories of Mr. Fielder and Mr. Plowright in order to _________.
| A．explain the origin of advertising |
| B．predict the future of advertising |
| C．expose problems in advertising |
| D．provide suggestions for advertising |
In ancient Egypt, a crier was probably someone who _________.
| A．owned a ship |
| B．had the loudest voice |
| C．ran a shop selling goods to farmers |
| D．functioned like today's TV or radio commercial |
The last two paragraphs are mainly about _________.
| A．the history of advertising |
| B．the benefits of advertising |
| C．the early forms of advertising |
| D．the basic design of advertising |
The people who built Stonehenge in southernEngland thou-sands of years ago had wild parties, eating barbecued pigs andbreaking pottery. This is accordingto recent workby archaeologists—history experts who investigate how human beings lived inthe past.
Archaeologists digging nearStonehenge last year discovered theremains of a large prehistoric villagewhere they think the builders of themysterious stone circle used to live. The village is about 4，600 years old, 
the same age as Stonehenge and as old as the pyramids in Egypt. U isless than two miles from the famous ancient landmark and lies inside amassive man-made circular dirt wall, or " henge " ，known as the DurringtonWalls.
Remains found at the site included jewelry, stone arrowheads, tools made of deer antlers, wooden spears and huge amounts of animal bones and broken pottery. “These finds suggest Stone Age people went to the village at special times of the year to feast andparty, “says Mike Parker-Pearson from Sheffield University in England.
He said many of the pig bones they found had been thrownaway half-eaten. He also said the partygoers appeared to have shotsome of the farm pigs with arrows, possibly as a kind of sport beforebarbecuing them.
An ancient road which led from the village to the River Avonwas also found. Here, the experts think, people came after their par-ties to throw dead relatives in the water so the bodies would bewashed downstream to Stonehenge.
Parker-Pearson believes Stonehenge was like a cemetery whereancient Britons buried the dead and remembered their ancestors. “The theory is that Stonehenge is a kind of spirit home to the ancestors.
The recent discovery of the village within the Durrington Wallsshows that Stonehenge didn't stand alone but was part of a muchbigger religious site, according to Parker-Pearson.
People still come to worship and celebrate at Stonehengetoday. They meet there when the sun sets on the shortest day of winterand when it rises on the longest day of summer. But the days of barbecuing whole pigs there and throwing family members into the riverare a thing of the past. What was Stonehenge according to the text?
| A．A village where hundreds of people once lived. |
| B．A place that regularly hosted large parties. |
| C．A church where local villagers would get married. |
| D．A site where dead people were placed or remembered. |
The underlined word “It” (Paragraph 2) refers to _________
| A．the village | B．Stonehenge |
| C．the pyramid | D．the dirt wall |
From the text we can infer that the people who came to the village _________
| A．liked to drink wine | B．knew how to hunt |
| C．were from Egypt | D．lived by the River Avon |
What do experts think people did after the village parties?
| A．Returned to live at Stonehenge. |
| B．Prayed for good luck in the new year. |
| C．Hunted farm pigs as a sport. |
| D．Put their dead relatives in the river. |
When do people most often go to Stonehenge today?
| A．When a new discovery is made. |
| B．At the beginning of summer and winter. |
| C．On the longest and shortest days of the year. |
| D．When they want to have a barbecue. |
Camping wild is a wonderful way to experience the natural world and, at its best, it makes little environmental influence. But with increasing numbers of people wanting to escape into the wilderness, it is becoming more and more important to camp unobtrusively(不引人注目地）and leave no mark.
Wild camping is not permitted in many places, particularly in crowded lowland Britain. Wherever you are, find out about organizations responsible for managing wild spaces, and contact them to find out their policy on camping and shelter building. For example, it is fine to camp wild in remote parts of Scotland, but in England you must ask the landowner's permission, except in national parks.
Camping is about having relaxation, sleeping outdoors, experiencing bad weather, and making do without modern conveniences. A busy, fully-equipped campsite(野营地）seems to go against this, so seek out smaller, more remote places with easy access to open spaces and perhaps beaches. Better still, find a campsite with no road access ： walking in makes a real adventure.
Finding the right spot to camp is the first step to guaranteeing a good night's sleep. Choose a campsite with privacy and minimum influence on others and the environment. Try to use an area where people have obviously camped before rather than creating a new spot. When camping in woodland, avoid standing dead trees, which may fall on a windy night. Avoid animal runs and caves, and possible homes of biting insects. Make sure you have most protection on the windward side. If you make a fire, do so downwind of your shelter. Always consider what influence you might have on the natural world. Avoid damaging plants. A good campsite is found, not made—changing it should be unnecessary. You needn't ask for permission when camping in _________.
| A．national parks in England |
| B．most parts of Scotland |
| C．crowded lowland Britain |
| D．most parts of England |
The author thinks that a good campsite is one _________.
| A．with easy access |
| B．used previously |
| C．with modem conveniences |
| D．far away from beaches |
The last paragraph mainly deals with _________.
| A．protecting animals | B．building a campfire |
| C．camping in woodland | D．finding a campsite with privacy |
The passage is mainly about _________.
| A．the protection of campsites |
| B．the importance of wild camping |
| C．the human influence on campsites |
| D．the dos and don'ts of wild camping |
When students and parents are asked to rate subjects according to their importance, the arts are unavoidably at the bottom of the list. Music is nice, people seem to say, but not important. Too often it is viewed as mere entertainment, but certainly not an education priority (优先）. This view is shortsighted. In fact, music education is beneficial and important for all students.
Music tells us who we are. Because music is an expression of the beings who create it, it reflects their thinking and values, as well as the social environment it came from. Rock music represents a lifestyle just as surely as does a Schubert song. The jazz influence that George Gershwin and other musicians introduced into their music is obviously American because it came from American musical traditions. Music expresses our character and values. It gives us identity as a society.
Music provides a kind of perception(感知）that cannot be acquired any other way. Science can explain how the sun rises and sets. The arts explore the emotive (情感的)meaning of the same phenomenon. We need every possible way to discover and respond to our world for one simple but powerful reason ： No one way can get it all.
The arts are forms of thought as powerful in what they communicate as mathematical and scientific symbols. They are ways we human beings “talk “to each other. They are the language of civilization through which we express our fears, our curiosities, our hungers, our discoveries, our hopes. The arts are ways we give form to our ideas and imagination so that they can be shared with others. When we do not give children access to an important way of ex-pressing themselves such as music, we take away from them the meanings that music expresses.
Science and technology do not tell us what it means to be human. The arts do. Music is an important way we express human suffering, celebration, the meaning and value of peace and love.
So music education is far more necessary than people seem to realize. According to Paragraph 1，students _________.
| A．regard music as a way of entertainment |
| B．disagree with their parents on education |
| C．view music as an overlooked subject |
| D．prefer the arts to science |
In Paragraph 2，the author uses jazz as an example to _________
| A．compare it with rock music |
| B．show music identifies a society |
| C．introduce American musical traditions |
| D．prove music influences people's lifestyles |
According to the passage, the arts and science _________.
| A．approach the world from different angles |
| B．explore different phenomena of the world |
| C．express people's feelings in different ways |
| D．explain what it means to be human differently |
What is the main idea of the passage?
| A．Music education deserves more attention. |
| B．Music should be of top education priority. |
| C．Music is an effective communication tool. |
| D．Music education makes students more imaginative. |
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