单选题In June of 1973 ,nine whales beached on the Florida coast. Beaching means swimming out of the ocean onto the beach, and usually dying there. No one knows why they do it, but a number of whales beach themselves every year. Some people think beaching is an accident. Perhaps the whales get confused. Scientists who studied the beaching of three dozen whales in Australia think the whales may have been confused by loud noises. Whales can tell where they are by sounds. They send out sounds and listen as they travel past or bounce off objects. Two days before these thirty-six whales beached, loud guns had been fired for two hours. The loud sounds may have confused the whales. Their confusion might have caused them to wander into low water. Whatever the reason whales beach, it is a sad event. People try to save them, but very few beached whales live. One whale that was rescued from beaching in Florida lived for forty-five days. That is the longest a beached whale has ever survived. And it lived that long only because it got attention from doctors. All over the world, scientists rush to whale beachings as soon as they hear about them. They hope to learn why whales beach, and how to save them.

单选题 Questions13-15 are based on the passage you have just heard.

单选题There was so much noise that the speaker couldn't make himself______. A. hearing B. to hear C. being heard D. heard

单选题When a man is buying clothes, ______.

单选题It must have rained last night, ______ the ground is wet. A. because B. as C. since D. for

单选题 Directions: For this part, you are allowed 30 minutes to write an essay on perseverance by referring to the saying 'What you do every day matters more than what you do every once in a while. ' You can cite examples to illustrate your point and then explain what you will do to enhance your perseverance. You should write at least 150 words but no more than 200 words.

单选题Mary's professor had her ______ paper many times before allowing her to present it to the committee.

单选题Mobile telecommunications ______ is expected to double in Shanghai this year as a result of a contract signed between the two companies. A. potential B. possession C. impact D. capacity

单选题 They have ______ to cover both of them.

单选题 众所周知，对于心血管功能不好的人来说，太大的工作压力可能会引起心血管疾病(cardiovascular disease)。最近研究表明即便对于健康人来说，工作压力仍有可能夺去他们的生命。工作压力包含很多方面，如工作量过大、对工作感到不满意，或在工作中不得志等。许多人工作量也相当大，但是如果工作有成效，工作压力就会最小化。然而，如果工作量过大，又很少或完全不加以控制，再碰上不公平的管理和极少的工作机会，工作压力就会破坏健康。

单选题Mary ______ her keys in her office and she had to ______ out of the house.

单选题Discerned from the perplexing picture of population growth the 1980 census provided, America in 1970s ______.

单选题Tell Mr. Wang to go to Mr. Li's office when you ______ him. [A] saw [B] will see [C] see

单选题The Mystery of the Nazca Lines A. If you visit the Peruvian coastal desert from north to south, you will note that sporadically you come upon a green and fertile valley surrounded by sand. The valleys of the Peruvian Pacific coast are like elongated oasis, through which run narrow and torrential rivers that originate in the snow-capped mountains of the Andes and which flow to the Pacific Ocean. As you travel more towards the south, these valleys become smaller and the rivers are narrower. Many of these rivers nm dry for most part of the year with the exception of the rainy season in the mountains (from December to March). B. Nazca is one of these valleys. Here an important civilization developed during the first six centuries after Christ. It was a culture made up of noteworthy textile weavers and potters (the best paintings of ancient Peru can be found on the ceramics from Nazca. Great desert plains and plateaus extend to the north and south of this region, a land of complete aridness where there is no vegetation, where the air is very dry and where it seldom rains. Compared to the other nearby valleys, this valley is inhabited by no one. The Nazca Lines C. Across the plain between the Inca and Nazca Valleys, there lies an area measuring 37 miles long and mile wide, on which there is an assortment of perfectly straight lines, many running parallel, others intersecting, forming a grand geometric form. In and around the lines there are also trapezoidal zones, strange symbols, and pictures of birds and beasts all etched on a giant scale that can only be appreciated from the sky. D. The figures come in two types: biomorphs and geoglyphs. The biomorphs are some 70 animal and plant figures that include a spider, hummingbird, monkey and a 1,000-foot-long pelican. The biomorphs are grouped together in one area on the plain. Some archaeologists believe they were constructed around 200 B.C., about 500 years before the geoglyphs. E. There are about 900 geoglyphs on the plain. Geoglyphs are geometric forms that include straight lines, triangles, spirals, circles and trapezoids. They are enormous in size. The longest straight line goes nine miles across the plain. F. The forms are so difficult to see from the ground that they were not discovered until the 1930's when aircraft, when surveying for water, spotted them. The plain, crisscrossed, by these giant lines with many forming rectangles, has a striking resemblance to a modem airport. The Swiss writer, Erich von Daniken, even suggested they had been built for the convenience of ancient visitors from space to land their ships. As tempting as it might be to subscribe to this theory, the desert floor at Nazca is soft earth and loose stone, not tarmac, and would not support the landing wheels of either an aircraft or a flying saucer. How Were They Built? G. Straight lines can be made easily for distances with simple tools. Two wooden stakes placed as a straight line would be used to guide the placement of a third stake along the line. One person would sight along the first two stakes and instructs a second person in the placement of the new stake. This can be repeated as many times as needed to make an almost perfectly-straight line miles in length. The symbols were probably made by drawing the desired figure at some reasonable size, then using a grid system to divide it up. The symbol could then be redrawn at full scale by recreating the grid on the ground and working on each individual square one at a time. So Why Are the Lines There? H. The American explorer Paul Kosok, who made his first visit to Nazca in the 1940s, suggested that the lines were astronomically significant and that the plain acted as a giant observatory. He called them 'the largest astronomy book in the world.' Gerald Hawkins, an American astronomer, tested this theory in 1968 by feeding the position of a sample of lines into a computer and having a program calculate how many lines coincided with an important astronomical event. Hawkins showed the number of lines that were astronomically significant were only about the same number that would be the result of pure chance. This makes it seem unlikely Nazca is an observatory. I. Perhaps the best theory for the lines and symbols belongs to Tony Morrison, the English explorer. By researching the old folk ways of the people of the Andes mountains, Morrison discovered a tradition of wayside shrines (神殿) linked by straight pathways. The faithful would move from shrine to shrine praying and meditating. Often the shrine was as simple as a small pile of stones. Morrison suggests that the lines at Nazca were similar in purpose and on a vast scale. The symbols may have served as special enclosures for religious ceremonies. J. Recently two researchers, David Johnson and Steve Mabee, have advanced a theory that the geoglyphs may be related to water. The Nazca plain is one of the driest places on Earth, getting less than one inch of rain a year. Johnson, while looking for sources of water in the region, noticed that ancient aqueducts, called puqulos, seemed to be connected with some of the lines. Johnson thinks that the shapes may be a giant map of the underground water sources traced on the land. Mabee is working to gather evidence that might confirm this theory. K. Other scientists are more skeptical, but admit that in a region where finding water was vital to survival, there might well be some connection between the ceremonial purpose of the lines and water. Johan Reinhard, a cultural anthropologist with the National Geographic Society, found that villagers in Bolivia walk along a straight pathway to shrines while praying and dancing for rain. Something similar may have been done at the ancient Nasca lines. L. The lines at Nazca aren't the only landscape figures Peru boasts. About 850 miles south of the plain is the largest human figure in the world laid out upon the side of Solitary Mountain. The Giant of Atacama stands 393 feet high and is surrounded by lines similar to those at Nazca. M. Along the Pacific Coast in the foothills of the Andes Mountains is etched a figure resembling a giant candelabrum. Further south, Sierra Pintada, which means 'the painted mountain' in Spanish, is covered with vast pictures including spirals, circles, warriors and a condor. Archaeologists speculate that these figures, clearly visible from the ground, served as guideposts for Inca traders. Preserving the Nazca Lines N. It is difficult to keep the Nazca Lines free from outside intervention. As with all ancient ruins, such as Machu Piccu, weather by wind and rain, and human tampering will take their toll on these ancient Lines. In recent years the Nazca Lines have suffered gradual destruction, as tomb raiders seeking pre-Inca artifacts scar the terrain with hundreds of burrows, garbage, among other waste material. A boom in copper and gold mining-including a mine built in 1997 a few feet from a 2,000-year-old, two-mile-long trapezoid—is defacing parts of the Nazca Lines with tracks from truck traffic. O. The damage to the Lines underscores Peru's desperate struggle to preserve its national patrimony. Archaeologists say they are watching helplessly as the quest for scholarship and conservation in a country viewed as the cradle of New World civilization is losing out to commercial interests, bleak poverty and the growing popularity of heritage sites as tourist attractions.

单选题My mother bought that coat ______ a low price.

单选题Three weeks after the suicide bombing, the police were still hunting for bombers for they believe more were ______.

单选题 Consumers are being confused and misled by the hodge-podge (大杂烩) of environmental claims made by household products, according to a 'green labeling' study published by Consumers International Friday. Among the report's more outrageous (耸人听闻的) findings, a German fertilizer described itself as 'earthworm friendly', a brand of flour said it was 'non-polluting' and a British toilet paper claimed to be 'environmentally friendlier'. The study was written and researched by Britain's National Consumer Council (NCC) for lobby group Consumer International. It was funded by the German and Dutch governments and the European Commission. 'While many good and useful claims are being made, it is clear there is a long way to go in ensuring shoppers are adequately informed about the environmental impact of products they buy,' said Consumers International director Anna Fielder. The 10-country study surveyed product packaging in Britain, Western Europe, Scandinavia and the United States. It found that products sold in Germany and the United Kingdom made the most environmental claims on average. The report focused on claims made by specific products, such as detergent (洗涤剂) insect sprays and by some garden products. It did not test the claims, but compared them to labeling guidelines set by the International Standards Organization (ISO) in September, 1999. Researchers documented claims of environmental friendliness made by about 2,000 products and found many too vague or too misleading to meet ISO standards. 'Many products had specially-designed labels to make them seem environmentally friendly, but in fact many of these symbols mean nothing,' said report researcher Philip Page. 'Laundry detergents made the most number of claims with 158. Household cleaners were second with 145 separate claims, while paints were third on our list with 73. The high numbers show how very confusing it must be for consumers to sort the true from the misleading.' he said. The ISO labeling standards ban vague or misleading claims on product packaging, because terms such as 'environmentally friendly' and 'non-polluting' cannot be verified. 'What we are now pushing for is to have multinational corporations meet the standards set by the ISO.' said Page.