单选题(Passengers) (are warned) not to (get off) a bus while (moving).

单选题That______girl is Mary's cousin.

单选题Many of the most damaging and life threatening types of weather, such as torrential rains and severe thunderstorms, begin quickly, strike suddenly, and disappear rapidly, destroying small regions while leaving neighboring areas untouched. Conventional (普通) computer models of the atmosphere have limited value in predicting short-lived local storms because the available weather data are generally not detailed enough to allow computers to see clearly the small atmospheric changes that come before these storms. In most nations, for example, weather-balloon observations are taken just once every twelve hours at location typically separated by hundreds of miles. With such limited data, conventional forecasting models do a much better job predicting general weather conditions over large regions than they do forecasting specific local events. Until recently, the observation-intensive approach needed for accurate, very short range forecasts, or "nowcasts", was impracticable. The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties involved in rapidly collecting and processing the raw weather data from such a network were beyond overcoming. Fortunately, scientific and technological advance have overcome most of these problems. Radar systems, automated weather instruments, and satellites are all capable of making detailed, nearly continuous observations over large regions at a relatively low cost. Communication satellites can transmit data around the world cheaply and immediately, and modem computers can quickly compile and analyze this large volume of weather information. Meteorologists (气象学家) and computer scientists now work together to design computer programs and video equipment capable of transforming raw weather data into words, symbols, and vivid graphic displays that forecasters can interpret easily and quickly. As meteorologists have begun using these new technologies in weather forecasting offices, nowcasting is becoming a reality.

单选题Many people (live) in Tokyo think (life) in a large city (offers) special (advantages). A. live B. life C. offers D. advantages

单选题Although__________ happened in the Arctic region sounds like fairy tale, it truly exits.

单选题{{B}}Passage 27{{/B}} Thousands of years before Columbus came to the New World, the American Indians entered North America by crossing a narrow strip of land that once connected Alaska and Siberia. The migrants entered a new world in which there were no people at all. But there were many animals to hunt, and there were forests where nuts, roots and berries could be gathered. (27) {{U}}When the Europeans came to the New World, the Indians, at first, taught the settlers how to plant corn, bake fish, make canoes and smoke tobacco.{{/U}} In return, the whites introduced horses, guns, gun-powder and alcohol. But at last, there were struggles for land, and the struggles could have only one result-war. When the wars were over, all Indians were moved to large tracts of land called reservations. Now, some of them, embittered by past mistreatment, are determined to preserve their tribal life; some wish to modernize the reservations. These alternatives, with many variations, are what most Indians have chosen-a future in modern technology and education, or the revival of ancient tradition and treaties.

单选题My parents will move back into town in a year or ______.

单选题Word has come __________ a large number of the British Airway employees will go on strike next week.

单选题Some expensive drugs can be economical ______.

单选题She wore clothes ______ .

单选题On seeing the old lady crossing the road, she _____ her car immediately.

单选题Patient: I'd like to make an appointment with Dr. Brooks. Nurse: ______

单选题Ted: What about going to that new Chinese restaurant? Talmy: ______

单选题—You are always staying at home watching TV. Why not come on a holiday with us on such a lovely day?

单选题My family __________ all teachers.

单选题To make up an objective test, the teacher writes a series of questions, ______ has only one correct answer.

单选题It was only by a great effort of will and courage that he was able to ________ himself together.