[填空题]Passage Nine Thirty-six years ago, when the grizzly was first listed as threatened, there were no bears along the Rocky Mountain Front, the plains at the base of the Rockies. If one was spied, it was routinely killed by ranchers. Now there are over a hundred, perhaps many more.

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[单项选择]Passage Three

Ten years ago, when environmental lawyer Kassie Siegel went in search of an animal to save the world, the polar bear wasn’t at all an obvious choice. Siegel and Brendan Cummings of the Center for Biological Diversity in Joshua Tree, Calif. , were looking for a species whose habitat was disappearing due to climate change, which could serve as a symbol of the dangers of global warming. Her first candidate met the scientific criteria—it lived in ice caves in Alaska’s Glacier Bay, which were melting away—but unfortunately it was a spider. You can’t sell a lot of T shirts with pictures of an animal most people would happily step on.
Next, Siegel turned to the Kittlitz’s murrelet, a small Arctic seabird whose nesting sites in glaciers were disappearing. In 2001, she petitioned the Department of the Interior to add it to the Endanger
A. call on people to take actions against global warming
B. make people aware of the danger of environmental damage
C. introduce to people a new concept of environmental protection
D. remind people of the importance of protecting endangered species

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[单项选择]Passage Two

Some years ago industries had more freedom than they have now, and they did not need to be as careful as they must today. They did not need to worry a lot about the safety of the new products that they developed. They did not have to pay much attention to the health and safety of the people who worked for them. Often new products were dangerous for the people who used them; often conditions in the work place had very bad effects on the health of the workers.
Of course sometimes there were real disasters which attracted the attention of governments and which showed need for changes. Also scientists who were doing research into the health of workers sometimes produced information which governments could not ignore. At such times, there were inquiries into the causes of the disaster or the problems. New safety rules were often intr
A. conditions in the work place
B. the freedom of industries in the past
C. changes in industrial production
D. the safety and health of workers and customers

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[单项选择]Passage Five

Several years ago during the dot-com passion, Manhattan lawyer John Kennedy sometimes wore a dark blue suit to meet potential Internet clients. But he soon realized that his conservative clothes were a strike against him before he even shook hands. So he began to do business in casual, open-shirt clothes.
But now the tables have turned. Today Silicon Valley executives are the ones often coming out in suits. No wonder that Fortune 500 executives are dusting off their silk ties and pants. "I would say there is a trend now toward a little more business dress," said Kennedy. "I find myself wearing suits more."
While there isn’t a rush toward formal office wear, clothiers and executives say the workplace uniform is heading that way. In many offices, men are wearing jackets, ties and pants more frequently than a year ago. Top wom
A. the Manhattan law business grew very quickly
B. shaking hands with clients became popular
C. the country was fighting the conservatives
D. the Internet companies boomed then

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[单项选择]Passage Three

Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bone or horn, metal knives and, more recently, rubber and plastic. And that was where we stuck, in surgical instrument terms, for many years. In the 1960s a new tool was developed, one which was, first of all, to be of great practical use to the armed forces and industry, but which was also, in time, to revolutionize the art and science of surgery.
The tool is the laser and it is, being used by more and more surgeons all over the world, for a very large number of different complaints. The word laser means: Light Amplification by Stimulated Emission of Radiation. As we all know, light is hot; any source of light--from the sun itself down to a humble match burning--will give warmth. But light is usually spread out over a wide area. The l
A. it is a highly intensified beam of light
B. its strength is increased by the heat of the sun
C. it can be connected to strong light sources
D. it is a concentration of light from different sources

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