单选题We were heartedly arguing about the financial matter, ______the telephone rang unexpectedly. A. while B. as C, when D. as soon as

单选题 The Magic of Diasporas(大移居) Immigrant networks are a rare bright spark in the world economy. Rich countries should welcome them. A．This is not a good time to be foreign. Anti-immigrant parties are gaining ground in Europe. Britain has been fretting(烦 恼，发愁) this week over lapses in its border controls. In America Barack Obama has failed to deliver the immi-gration reform he promised, and Republican presidential candidates would rather electrify the border fence with Mexico than educate the children of illegal aliens. America educates foreign scientists in its universities and then expels them, a policy the mayor of New York calls 'national suicide'. B．This illiberal turn in attitudes to migration is no surprise. It is the result of cyclical economic gloom combined with a rise in pressure on rich countries' borders. But governments now weighing up whether or not to try to slam the door should consider another factor: the growing economic importance of diasporas, and the contribution they can make to a country's economic growth. C．Diaspora networks-of Huguenots, Scots, Jews and many others—have always been a potent economic force, but the cheapness and ease of modern travel has made them larger and more numerous than ever before. There are now 215m first-generation migrants around the world: that's 3% of the world's population. If they were a nation, it would be a little larger than Brazil. There are more Chinese people living outside China than there are French people in France. Some 22m Indians are scattered all over the globe. Small concentrations of ethnic and linguistic groups have always been found in surprising places-Lebanese in west Africa, Japanese in Brazil and Welsh in Patagonia, for instance—but they have been joined by newer ones, such as west Africans in southern China. D．These networks of kinship(亲缘关系) and language make it easier to do business across borders. They speed the flow of information: a Chinese trader in Indonesia who spots a gap in the market for cheap umbrellas will alert his cousin in Shenzhen who knows someone who runs an umbrella factory. Kinship ties foster trust, so they can seal the deal and get the umbrellas to Jakarta before the rainy season ends. Trust matters, especially in emerging markets where the rule of law is weak. So does the knowledge of the local culture. That is why so much foreign direct investment in China still passes through the Chinese diasporas. And modern communications make these networks an even more powerful tool of business. E．Diasporas also help spread ideas. Many of the emerging world's brightest minds are educated at Western universities. An increasing number go home, taking with them both knowledge and contacts. Indian computer scientists in Bangalore bounce ideas constantly off their Indian friends in Silicon Valley. China's technology industry is dominated by 'sea turtles' (Chinese who have lived abroad and returned). F．Diasporas spread money, too. Migrants into rich countries not only send cash to their families; they also help companies in their host country operate in their home country. A Harvard Business School study shows that American companies that employ lots of ethnic Chinese people find it much easier to set up in China without a joint venture with a local firm. G．Such arguments are unlikely to make much headway against hostility towards immigrants in rich countries. Fury against foreigners is usually based on two (mutually incompatible) notions: that because so many migrants claim welfare they are a drain on the public purse; and that because they are prepared to work harder for less pay they will depress the wages of those at the bottom of the pile. The first is usually not true (in Britain, for instance, immigrants claim benefits less than local people do), and the second is hard to establish either way. Some studies do indeed suggest that competition from unskilled immigrants depresses the wages ofunskilled locals. But others find this effect to be small or non-existent. H．Nor is it possible to establish the impact of migration on overall growth. The sums are simply too difficult. Yet there are good reasons for believing that it is likely to be positive. Migrants tend to be hard-working and innovative. That spurs productivity and company formation. A recent study carried out by Duke University showed that, while immigrants make up an eighth of America's population, they founded a quarter of the country's technology and engineering firms. And, by linking the West with emerging markets, diasporas help rich countries to plug into fast-growing economies. I．Rich countries are thus likely to benefit from looser immigration policy; and fears that poor countries will suffer as a result of a 'brain drain' are overblown. The prospect of working abroad spurs more people to acquire valuable skills, and not all subsequently emigrate. Skilled migrants send money home, and they often return to set up new businesses. One study found that unless they lose more than 20% of their university graduates, the brain drain makes poor countries richer. J．Government as well as business gains from the spread of ideas through diasporas. Foreign-educated Indians, including the Prime Minister, Manmohan Singh (Oxford and Cambridge) and his sidekick Montek Ahluwalia (Oxford), played a big role in bringing economic reform to India in the early 1990s. Some 500,000 Chinese people have studied abroad and returned, mostly in the past decade; they dominate the think-tanks that advise the government. K．As for the old world, its desire to close its borders is understandable but dangerous. Migration brings youth to ageing countries, and allows ideas to circulate in millions of mobile minds. That is good both for those who arrive with suitcases and dreams and for those who should welcome them.

单选题 For thousands of years man has exploited and often destroyed the riches of land. Now man covets(觊觎) the wealth of the oceans. Even the most conservative estimates of resources in the seabed stagger the imagination. In the millions of miles of ocean that touch a hundred nations live four of five of living things on earth. In the seabed, minerals and oil existed in lavish supply. Man may yet learn to use a tiny fraction of this wealth. However, this fraction alone could set off a new age of colonial war unless international law soon determines how it shall be shared. What is to be done to regulate and control exploitation of the oceans is a problem of international concern. In crowded England, serious plans have been developed to build entire cities just off the coast. Offshore airport may solve the demand for large tracts near such large coastal cities as New York and Los Angeles. Some people, quick to take advantage of the legal confusion that reigns beyond coastal waters, have planned to build independent islands at the top of reefs outside the county's territorial limit—that is indeed, a romantic notion, but one with, it is suspected, the more prosaic aim of avoiding the constrictions of domestic law concerning gambling and taxes. In another case, the United Nations were presented with an application for permission to extract minerals from the bed of Red Sea in an area 50 miles from the coastal states. The secretariat dodged this thorny question, citing lack of authority to act. Such claims are no longer isolated or meaningless. The great wealth from the oceans must be divided equitable among nations. But wealth is not the only thing at debate. We must also learn how to protect the oceans from the threat of pollution. A few years ago, 'practical' men dismissed speculations about wealth in the sea. 'That is economic foolishness,' they said. It will never be economically profitable to exploit the seabeds, no matter how great the riches to be found there. Unfortunately, they underestimated the lure of gold as the mother of invention. Yet the pessimists may be proved right. In these pioneer years of the Ocean Age, the damage done sometimes seems to exceed the benefit gained. Beaches from England to Puerto Rico to California have been soaked in oily mud. Insecticides, seeping into the rivers and then oceans, have killed fish and birds and revived fears that some chemicals may contaminate our waters when they are used as garbage dumps. Largely in ignorance, we are tinkering with our greatest source of life.

单选题In ______, the whole tangled saga is a classic case of serious allegations falling through the cracks between federal, state and local jurisdictions and between state lines. A. countenance B. retrospect C. gauge D. injection

单选题通读下面的短文，掌握其大意。然后，从每小题的四个选择项中选出可填入相应空白处的最佳选项。Over the summer, my family took a divip to Iceland to see the natural beauty of it.Little did I21　 I would wake up one morning to have my eyes swelled up（肿胀

单选题The doctor's______was that she should go and see the specialist in this field. A. constraint B. counsel C. coherence D. consciousness

单选题After years of research, Dr. Duke ______ new ideas on the muses of dream.

单选题—What are you going to study next year? —I don"t know, but it"s time ______ something.

单选题His business was very successful, but it was at the ______ of his family life.

单选题The European Union countries were once worried that they would not have supplies of petroleum. A. pure B. efficient C. potential D. sufficient

单选题Bill is not in the office．He ____ to the library an hour ago．

单选题When a psychologist does a general experiment about the human mind. he selects people ______ and asks them questions.

单选题They decided to ___________ the contract because a number of the conditions had not been met.

单选题下面的短文后列出了10个句子，请根据短文的内容对每个句子作出判断：如果该句提供的是正确信息，选择A；如果该句提供的是错误信息，选择B；如果该句的信息文中没有提及，选择C。在答题卡相应位置上将答案选项涂黑。Finding Paradise 天堂 and Success in Retirement　　Ivy Singh and her husband had their retirement all

单选题The secretary wants to ______ all the file clerks to make preparations for the company Christmas party.

单选题When I returned home, I found I _____my umbrella in the office.

单选题The low interest rates on banks loans provided an impetus for many to buy homes.

单选题Although a solemn tone was appropriate to the seriousness of the occasion, the speaker lapsed into ______ which was depressing rather than moving.

单选题The two countries achieved some progress in the sphere of trade relations, traditionally a source of ______ irritation.