Twothirds of the world's major rivers have now been disrupted with more than 50,000 dams in an attempt to store water and provide power.In the US，there are more than 85,000 dams，disrupting large and small rivers，and in most cases transforming natural flow.The most famous of these，the Hoover Dam，constructed in the 1930s，is mainly responsible for the fact that the Colorado River no longer reaches the ocean.
Dams，besides all their attractive benefits，also have negative impacts.Creating a reservoir means a large area must be flooded.Communities may lose their land，houses and culturally important sites.
Environmentally，the new reservoir can be a paradise for wildlife，especially birds；however，it can cause greenhouse gas emissions and poison the water.Also，the dramatic rise and fall of water levels during dam releases is too extreme for plants and animals to cope with，resulting in dead zones around the shores of reservoirs.Fish that lay their eggs in the shallows，for example，may find a few hours later that those sites are high and dry.
Downstream(在下游方向)of a dam，the flow may be reduced so that farmers cannot irrigate their fields.Many rivers run through national borders，which may cause conflict over precious water.Disputes have been continuing between India and Pakistan，and Turkey，Syria and Iraq，for example.
Dams don't just block the flow of water.They also prevent fish migrations，and dams are a barrier to sediment(沉淀物)flows.Instead of rushing downriver，sediments get backed up against the dam wall，which causes the reservoir level to increase over time.However，sediments which are rich in nutrients have become a problem.The fertility of the entire system can be influenced，with soils lost during seasonal rains not being replaced.
Perhaps the biggest problem can be seen in deltas，which are sinking into the oceans.Groundwater is being extracted to feed the city，causing the city to sink，and sediments washed away by the ocean are no longer being replaced.The result is that sea level rises in cities from Shanghai to Alexandria.The Hoover Dam is mentioned in the passage in order to show________.
| A．dams play an important role in our life |
| B．dams have impacted the flow of the rivers |
| C．dams make people lose their land and houses |
| D．dams have many benefits as well as side effects |
What effects does creating a reservoir have on people's life?
a．People will see fewer birds on the sides of the rivers.
b．Farmers will have less water to irrigate their fields.
c．Visitors can't visit some cultural relics any more.
d．More conflicts and wars over water will break out.
e．More kinds of fish will become extinct in future.
| A．a，c | B．c，e |
| C．b，e | D．b，c |
With many dams built across the rivers，fish ________.
| A．will find more places to lay their eggs |
| B．will face a dangerous habitat |
| C．will be fed on more sediments rich in nutrients |
| D．will find it easier to deal with the rise of water |
How can dams influence large cities like Shanghai?
| A．Their entire system will be influenced. |
| B．The rainy season will last longer. |
| C．They will lie below sea level in future. |
| D．Rich soils will be washed away. |
What does the passage mainly talk about?
| A．Environmental loss of dams. |
| B．Cultural loss of dams. |
| C．Economic gain of dams. |
| D．Environmental benefits of dams. |
Although man has known asbestos for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H. W. Johns, owner of a New York City Supply Shop for roofers, was responsible for(对…负责) the opening of that first mine.
Mr. Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands. How astonished the customers were to discover that he was not burned at all. You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport (carry) them from Italy to the United States, Mr. Johns sent out a young scientist to seek a source nearer home. This young man found great vein(岩脉), in the province of Quebec in Canada.
Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen. When it is mined, the asbestos is heavy, just as you would expect a mineral to be. When it is separated, a strange thing happens; the rock breaks down into fine, soft, soapy fibres(纤维).
Scientists do not know why the rock can be separated easily into threads(线), but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”.Which title best expresses the main idea of this passage?
| A．Asbestos mined in Canada | B．Fireproof matter |
| C．A “wonder” mineral | D．A new roofing material |
Johns proved his ability as a salesman by_______.
| A．going into roofing business | B．carrying asbestos from Italy |
| C．sending a trained scientist | D．showing the use of asbestos gloves |
Which is the most important character of asbestos that the author wants to show us?
| A．It is like thread. | B．It feels soapy. |
| C．It burns easily. | D．It is unusually heavy. |
The author’s main purpose in writing this passage was to _______.
| A．show the need for more scientists |
| B．compare asbestos with other minerals |
| C．increase the sales of asbestos |
| D．present facts about asbestos |
The blue tits(山雀) have been inspecting the nest-box again this year. The male is the house-hunter but the female will make the final choice. He lands at the hole and turns his head to expose his white cheeks as a signal to attract the female from where she has been feeding.
Among many birds that nest in holes, the male has a light-coloured patch on its plumage(鸟羽) which acts as signal for drawing the female’s attention to a suitable nesting-place. Unlike the blue tit, the redstart(红尾鸲) may be only the male that strikingly coloured and the female is not beautiful.
A few years ago I was lucky enough to spot a pair of redstarts in action in a Walsh wood. The male was leading an interested female to holes that he had previously(先前) checked out. He sat at the entrance of each hole and put his head on to show off his white forehead, or his head in to reveal(显露) his tail.
If the female failed to react to his visual signals, the male sometimes sang for extra effect, while gliding towards her on spread wings and tail. Once the female accepts by following the male through the hole the displays stop, you must be at the right place at the right time to watch them. How do the blue tits choose their nest?
| A．They choose their nest together. |
| B．The male chooses their nest. |
| C．The house-hunter chooses their nest. |
| D．The female chooses their nest. |
The writer was lucky to see ________.
| A．how the male made his tricks |
| B．how an interested female played with the male happily |
| C．what the male displayed and won the female |
| D．that the male tried his best but failed to attract the female |
You can spot a pair of redstarts in a Walsh wood ________.
| A．at any time | B．regularly | C．in April | D．occasionally |
The writer is probably ________.
| A．a bird expert | B．a bird-hunter |
| C．a bird raiser | D．a scientist |
When you are in another country, it is important to know the language, but it is equally important to know how to communicate nonverbally(非语言地), before saying anything by making gestures. According to a pioneer in nonverbal communication, only 30 to 35 percent of our communication is verbal. When people don't know the language, the most common way to communicate is through gestures. However, many gestures have different meanings, or no meaning at all, in different parts of the world.
In the United States, for example, nodding your head up and down means “yes”. In some parts of Greece and Turkey, however, this motion can mean “no”. In Southeast Asia, nodding your head is a polite way of saying “I've heard you”.
In ancient Rome, when the emperor wanted to spare someone's life, he would put his thumb up. Today in the United States, when someone puts his / her thumb up, it means “Everything is all right”. However, in Sardinia and Greece, the gesture is insulting and should not be used there.
In the United States, raising your clasped hands above your head means “I’m the champion” or “I’m the winner”. It is the sign prizefighters make when they win a fight. When a leading Russian statesman(政治家) made this gesture after a White House meeting, Americans misunderstood and thought he meant he was a winner. In Russia, however, it is a sign of friendship.
In the United States, holding your hand up with the thumb and index finger in a circle and the other three fingers spread out means “Everything is O.K.” and is frequently used by astronauts and politicians. In France and Belgium, it can mean “You’re worth nothing.”
There are other nonverbal signals that people should be aware of when they go to another country, such as the distance to maintain between speakers. Americans usually feel comfortable when speaking with someone if the distance between them is about eighteen inches to arm’s length. Anything closer makes them feel uncomfortable.
When talking to Americans, it is also important to make eye contact. If you look down when talking to an American, he / she may feel that you are embarrassed, afraid, or trying to hide something.
In addition to knowing how to communicate nonverbally in a country, it is important to know what you and he cannot discuss. In the United States, there are certain topics to avoid when you first meet someone, For example, don’t ask people their age, weight, religion, marital status(婚姻状况), how much money they earn, or how much something costs. You can talk about work, the weather, traffic problems, sports, food, news of the day, where one lives, consumer subjects (computers, car repairs, and so forth), and travel or vacation plans.
These few examples illustrate that your actions can speak louder than your words. In a particular cultural contest, what you say and what you don’t say are equally important. Which of the following is true?
| A．People all over the world only communicate verbally. |
| B．Most of our gestures have no meaning at all. |
| C．Some people think that 65 to 70 percent of our communication is nonverbal. |
| D．Gestures are the most common way to common way to communicate. |
As we can see from the passage there are ______ kinds of nonverbal communication signals.
| A．four | B．five | C．six | D．seven |
Please paraphrase the clause“…your actions can speak louder than your words.
| A．Your deeds are better than your words |
| B．What you do is better than what you say |
| C．You try to show your best manners |
| D．you are better understood by your gestures than through your words |
The main idea of the passage is that when you are in another country, ______.
| A．it is unimportant to know the language |
| B．it is important to know what you can talk about to a foreigner |
| C．to know how to communicate nonverbally is as important as to know the language |
| D．to communicate the rough gestures is more important than to know the language |
I came to live here where I am now between Wounded Knee Greek and Grass Greek. Others came too, and we made these little grey houses of logs that you see, and they are square, It is a bad way to live, for there can be no power in a square.
You have noticed that everything an Indian does is in a circle, and that is because the Power of the World always works in circles, and everything tries to be round. In the old days when we were a strong and happy people, all our power came to us from the respectful circle of the nation, and so long as the circle was unbroken, the people were getting rich. The flowering tree was the living center of the circle, and the circle of the four quarters nursed it. The east gave peace and light, the south gave warmth, the west gave rain, and the north with its cold and strong wind gave strength and continuous power. This knowledge came to us from the outer world with our brief. Everything the Power of the World does is done in a circle. The sky is round, and I have heard that the earth is round like a ball, and so are all the stars. Birds make their nests in circle, for theirs are the same as ours. The sun comes forth and goes down again in a circle. The moon does the same, and both are round. Even the seasons form a great circle in their changing, and always come back again to where they were. The life of a man is a circle from childhood to childhood, and so it is in everything where power moves. Our places were like the nests of birds, and these were always set in a circle, the nation’s circle, a nest of many nests, where the Great Spirit meant for us to nurse our children.
But the Wasichus (Indian word for “white people”) have put us in these square boxes. Our power is gone and we are dying, for the power is not in us any more. You can look at our boys and see how it is with us. Where we were living by the power of the circle in the way we should, boys were men at twelve or thirteen years of age. But now it takes them very much longer to be bull - grown. According to the passage, the Indians _______.
| A．don’t have modern instruments in their homes |
| B．refused to move from round places |
| C．lived in round places, but were forced to live in square houses |
| D．lived in round places, but then decided to move into square houses |
Two things being compared in the passage are _______.
| A．the Indians’ past and present living conditions |
| B．the Indians’ past and modern beliefs |
| C．the Indians’ old and new power |
| D．people and nature |
In the second paragraph “the four quarters” refers to _______.
| A．the four rooms of the Indian’s house |
| B．the four kinds of natural power |
| C．the four seasons |
| D．the four directions |
According to the author, once the Indians moved into square houses, _______.
| A．they had to move to other houses |
| B．boys took more time to grow into men |
| C．they forgot the old way of life |
| D．everyone was not happy |
CARDIFF, Wales Poets, singers and musicians from across the globe gathered in Wales to celebrate the tradition(传统) of storytelling.
“It might seem strange that people still want to listen in age of watching television, but this is an unusual art form whose time has come again,” said David Ambrose, director of Beyond the Border, an international storytelling festival(节) in Wales.
“Some of the tales, like those the Inuit from Canada, are thousands years old. So our storytellers have come from distant lands to connect us with the distance of time,” he said early this month.
Two Inuit women, both in their mid 60s, are among the few remaining who can do Kntadjait, or throat singing, which has few words and much sound. Their art is governed by the cold of their surroundings, forcing them to say little but listen attentively.
Ambrose started the festival in 1993, after several years of working with those reviving (coming back into use or existence) storytelling in Wales.
“It came out of a group of people who wanted to reconnect with traditions. and as all the Welsh are storytellers, it was in good hands here.” Ambrose said.Ambrose believes that the art of storytelling _______.
| A．will be more popular than TV |
| B．will be popular again |
| C．started in Wales |
| D．are in the hands of some old people |
From the tales told by the Inuit, people can learn _______.
| A．about their life as early as thousands of years ago |
| B．why they tell the stories in a throat-singing way |
| C．how cold it has been where the Inuit live |
| D．how difficult it is to understand the Inuit |
According to the writer, which of the following is NOT true?
| A．Storytelling once stopped in Wales. |
| B．Storytelling has a long history in Wales. |
| C．Storytelling is always well received in Wales. |
| D．Storytelling did not come back until 1993 in Wales. |
The underlined phrase in good hands means _______.
| A．controlled by rich people | B．grasped by good storytellers |
| C．taken good care of | D．protected by kind people |