阅读材料，回答下面试题。

The top of the world is a wonderland. In winter, the temperature often fails to -30~F and the sun never rises. The ocean is surrounded by frozen ground. There are few people or trees, but to polar bears, the Arctic(北极) is home.

Polar bears have thick fur, big paws and other features that make them well prepared for life in their tough environment. In fact, they need the Arctic sea ice for survival. But climate change is causing larger and larger areas of summer sea ice to melt(融化). Experts say that if warming pat-terns continue, the Arctic could be free of summer sea ice by 2050. That may cause two-thirds of the word' s 20,000 polar bears to be gone by then too.

Polar bears can' t survive for long on land. Seals are their main source of food. The only place where polar bears can hunt seals is on the ice. Although these bears are strong swimmers, they are no match for lighming swift seals in the water. A polar bear has brilliantly clever strategies to overcome this disadvantage. In winter the bear waits motionless beside a seal' s breathing hole, which is a narrow tunnel through the ice. Often many hours pass before the seal comes up for air and the bear kills it with a powerful blow of its paw. In summer, the polar bears that live on land eat very little and wait for the sea ice to return.

With the sea ice forming later in the year and melting earlier, polar bears do not have enough opportunity to hunt and eat. Less sea ice makes it harder for the bears to catch the seals. The bears must swim longer distances between ice packs( 大片浮冰), and they can' t always make it.. The ice is also getting thinner. These conditions can cause polar-bear cubs to become separated :from their mothers, who provide them with food.

Steven Amstrup is the chief scientist of Polar Bear International. The group aims to save the bears and their home. "The more people who see polar bears and understand their difficult situations, the better the chance we' 11 alter our warming path in time to save them," he says.

第21题单选 Which is the best title for the passage?

A.Climate Change in the Arctic

B.How to Protect the Environment

C.The Arctic Is Home to Polar Bears

D.Polar Bears in Danger

参考答案：D

第22题单选 Where do polar bears usually hunt seals?

A.On land.

B.In open water.

C.In openings in the sea ice.

D.At the bottom of the sea.

参考答案：C

第23题单选 The word" cubs" in the fourth paragraph is closest in meaning to_________

A.adults

B.babies

C.Hunters

D.enemies

参考答案：B

第24题单选 According to the passage, which of the following statements is TRUE?

A.Starving polar bears are increasingly coming into villages, where they may be killed eitherfor food or safety.

B.Polar bears can spend their entire lives on land if the sea ice melts completely.

C.Two-thirds of the world' s polar bears may disappear by 2050 as global warming continues.

D.The growing distance between ice packs is not a problem for polar bears, because they areexcellent swimmers.

参考答案：C

第25题单选 What' s the mission of Polar Bears International?

A.Saving energy.

B.Conducting scientific research.

C.Seeking international cooperation.

D.Saving polar bears and their home.

参考答案：D

阅读材料，回答下面试题。

Extensive new studies suggest that the world has made extraordinary progress in reducing poverty in recent decades. The research suggests that the pace of economic progress has been rapid and continued for decades, built on the foundations of relative political stability, rising trade, and economic liberalization (自由化) after two world wars. One new study, published recently by the Institute for International Economics in Washington, find that the proportion of the 6.1 billion people in the world who live on $1 a day or less shrank from 63 percent in 1950 to 35 percent in 1955and 12 percent in 1999. By some other measures, the progress has been more modest. Still, economists agree that poverty has plunged in key nations such as India and especially China, thanks to slowing population growth as well as economic freedom. "This is a huge success for the world as a whole," says Harvard University economist Richard Cooper. "We are doing something right. "

The news comes as the World Bank is about to open its annual meeting in Washington an event that has been troubled in recent years by protests that the Bank and its sister Institution, the International Monetary Fund(IMF 国际货币组织) have done too little for the world’s poor. The new economic research will not put an end to that dispute. Vast populations remain poor, and many still question the wisdom of World Bank policies. Nonetheless, the research findings are helpful to understand what policies should be followed by those institutions and hundreds of other development groups working very hard to hasten the pace of world economic progress. If dramatic gains are under way, the present policies calling for open tharkets, free business activities, and tight monetary control are working and correct.

But critics of IMF and World Bank policies maintain that such economic success stories as Japan, China, South Korea and Singapore are rooted in more than just "free" markets. These nation shave managed to grow rapidly, and thereby reduce poverty, by limiting imports when their domestic industries were young, pushing exports to rich nations, and putting controls on purely international financial flows. The have been open to foreign owned factories but have often insisted that those investors share the knowledge and skill on modern technologies.

第26题单选 The word "plunged" in the first paragraph means__________.

A.decreased

B.climbed

C.increased

D.dropped into water

参考答案：A

第27题单选 From the passage, we learn that__________.

A.World Bank has done nothing to help the poor in the world

B.IMF only helps the rich in the world

C.World Bank controls all the banks in the world

D.There are some. demonstrations against World Bank in recent years

参考答案：D

第28题单选 According to this passage, in __________, the world had the largest number of poor people.

A.1999

B.1955

C.1950

D.1990

参考答案：C

第29题单选 According to the author, the economy of East Asian countries grew very fast because of the following measures EXCEPT__________.

A.encouraging export

B.opening up to foreign investments

C.limiting international financial flows

D.controlling import

参考答案：B

第30题单选 The best title for this passage might be__________.

A.China’s Contribution to the Reduction of Poverty in the World

B.World Bank’s Extraordinary Progress in Recent Decades

C.India’s Leading Role in Reducing Global Poverty

D.Global Progress in Reducing Poverty

参考答案：D

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