单选题. The United States is a country made up of many different races. Usually they are mixed together and can't be told one from another. But many of them still talk about where their ancestors came from. It is something they are proud of. The original Americans, of course, were the Indians. The so-called white men who then came were mostly from England. But many came from other countries like Germany and France. One problem the United States has always had is discrimination. As new groups came to the United States they found they were discriminated against. First it was the Irish and Italians. Later it was the blacks. Almost every group has been able to eventually escape this discrimination. The only immigrants who have not are the blacks. Surprisingly enough the worst discrimination today is shown towards the Indians. One reason the Indians are discriminated against is that they have tried so hard to keep their identity. Of course they are not the only ones who have done so. The Japanese have their Little Tokyo in Los Angeles and the Chinese a Chinatown in New York. The Dutch settlement in Pennsylvania also stays separate from other people. Their towns are like something from the 19th century. They have a different reason than the other groups for staying apart. They live separately for religious reasons rather than keeping together in a racial group. Although some groups have kept themselves separate and others have been discriminated against, all groups have helped make the United States a great country. There is no group that has not helped in some way. And there is no group that can say they have done the most to make it a great country. Many people still come from other countries to help the United States grow. A good example is the American project that let a man walk on the moon. It was a scientist from Germany who was most responsible for doing that. It is certain that in the future the United States will still need the help of people from all racial groups to remain a great country.1. Which of the following statements can best describe the main idea of this passage? ______

单选题. The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the past 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic device such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation (航空) industry, has recommended that all airlines ban (禁止) such devices from being used during "critical" stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircraft's computers. Experts know that portable device emit radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. The fact that aircraft may be vulnerable (易受损的) to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment. As worrying, though, is the passenger who can't hear the instructions to turn off his radio because the music's too loud.1. The passage is mainly about ______.

单选题1.

单选题3. A ______ people will help you when you are in trouble.

单选题11. Many governments are now taking ______ to reduce smoking in public places.

单选题 America is a country on the move

单选题15. So hard ______ his study that he finally succeeded.

单选题. Sustainable management is seen as a practical and economical way of protecting species from extinction. Instead of depending on largely ineffective laws against poaching (偷猎), it gives local people a good economic reason to preserve plants and animals. In Zimbabwe, for instance, there is a sustainable management project to protect elephants. Foreign tourists pay large sums of money to kill these animals for sports. This money is then given to the inhabitants of the area where the hunting takes place. In theory, locals will be encouraged to protect elephants, instead of poaching them because of the economic benefit involved. This sounds like a sensible strategy, but it remains to be seen whether it will work. With corruption in these developing countries, some observers are skeptical (怀疑的) that the money will actually reach the people it is intended for. Others wonder how effective the locals will be at stopping poachers. There are also questions about whether sustainable management is practical when it comes to protecting forests. In theory, the principle should be the same as with elephants—allow logging companies to cut down certain number of trees, but not so many as to completely destroy the forest. Sustainable management of forests requires controls on the number of trees which are cut down, as well as investment in replacing them. Because almost all tropical forests are located in countries which desperately need revenue from logging, there are few regulations and incentive to do this. One solution might be to certify wood which comes from sustainably managed forests. In theory, consumers would buy only this wood and so force logging companies to go "green" or go out of business. Unfortunately, unrestricted logging is so much more profitable that wood prices from managed forests would cost up to five times more—an increase that consumers, no matter how "green", are unlikely to pay.1. Which of the following statements is true in understanding the "sustainable management"? ______

单选题 For some time past

单选题9. Despite the sudden breakdown of the General Manager, ______ work is going on in the company.

单选题6. My bike is broken, so I need to have it ______.

单选题. I find it wholesome to be alone the greater part of the time. To be in company, even with the best, is soon wearisome and dissipating, and I never found a companion so companionable as solitude. We are for the most part more lonely when we go abroad than when we stay in our chambers, for solitude is not measured by the miles of space that intervene between a man and his fellows. The farmer, who can work alone all day without feeling lonesome, but must recreate with others at night, wonders how the student can sit alone at night; he does not realize that the student, though in the house, is actually at work in his field and chopping his wood as the farmer was in his. Society is commonly too cheap. We meet at very short intervals, not having had time to acquire any new value for each other; we meet at meals three times a day and give each other a new taste of that musty old cheese that we are; we live thick and are in each other's way, and I think that we thus lose some respect for one another. We have bad to agree on a certain set of roles, called etiquette and politeness, to make this frequent meeting tolerable. Certainly less frequency would suffice for all important and hearty communications between men. It would be better if there were but one inhabitant to a square mile, as where I live, for as the value of a man is not in his skin, we need not touch him.1. A man can be lonely in a crowd because ______.

单选题 They are ______ in name

单选题. What was the origin of the oil which now drives our motorcars and aircraft? Scientists are 21 about the 22 of coal, but they do not seem so 23 when asked about oil. They think that the oil 24 the surface of the earth originated in the 25 past, and was formed 26 living things in the sea. Countless billions of 27 sea creatures and plants lived and 28 to the sea bed. They were covered with huge 29 of mud; and by 30 of chemistry, pressure and temperature were changed through long 31 into what we know as oil. For these creatures to become oil, it was necessary that they should be 32 between layers of rock for an enormous 33 of time. The 34 that oil originated in the sea is 35 by a glance at a map 36 the chief oil fields of the world; very 37 of them are far distant from the oceans of today. In some places gas and oil 38 to the surface of the sea from its bed. The rocks in which oil is found are 39 marine origin too. They are sedimentary rocks, rocks which were 40 by the action of water on the ocean.21.

单选题4.

单选题 Katherine walked into a newspaper office

单选题 Ever since humans lived on the earth

单选题12. I ______ the right word in the dictionary to find a word to describe your beauty.

单选题. There were many different cultures in the ancient world, but the two that had the most influence on European and American civilizations were the Greek and the Roman. Often these two cultures are lumped together in our minds, as if they were really exactly alike. But that is not the case. In many ways the Greeks and the Romans could not have been more different. The Greeks were truly democratic, often without a single leader but instead governed by a group of men chosen by the people. The Romans were semi-democratic. They had a governing Senate, but the political power was mostly or completely in the hands of a single emperor. Both cultures were great builders. But the construction interests of the two cultures were also different. The Greeks tended to be more artistic. Their buildings were well constructed and they were especially interested in temples, columns, and decorative forms. The Romans, on the other hand, were more engineers than artists. They concentrated their efforts on urban planning, well-functioning water pipes, and the best roads. Only in cooking and eating habits are the two cultures really similar. Both peoples ate very well indeed: lots of fish, fresh vegetables and fruits, healthy meals, holding at the same time long discussions and tasting excellent wines. In fact, it would probably be fair to say that they both loved life in their warm, sea-oriented climates, and they both lived a full life.1. What is the first paragraph about?______

单选题1.