单选题_____ that the truth would be discovered sooner or later.

单选题His children are well-behaved, ______ those of his sister's are very naughty. A. and B. so C. thus D. while

单选题One or perhaps more pages ______ missing. A. is B. are C. has been D. have been

单选题Not until I reminded him for the third time ______ working and looked up.

单选题He was apparently planning to rent a car and drive __________ to Los Angeles.

单选题The child was ______ to open the refrigerator door. A. barely tall enough B. barely enough tall C. tall barely enough D. enough barely tall

单选题I didn"t know what to do but then an idea suddenly ______ me.

单选题The couple never got __________ the loss of their son.

单选题In Australia, like in other countries, the Asians make their influence ______ in businesses large and small.

单选题He finds it difficult to ______ himself to the climate here.

单选题I didn’t mean _____anything, but those apples looked so nice that I couldn’t resist _________ one.

单选题Van Gogh is ______ the best-known painter in the world.

单选题I didn't enjoy him singing so softly, though I generally enjoy quiet songs. A. him B. so C. though D. generally

单选题Some economists attribute much of the rising wage inequlity in this country _______ the shift in favor of the most skilled workers.

单选题Speaker A: Can I use your pen? Mine is broken. Speaker B: I guess I have one on my desk.______

单选题______ explain it to him, he still didn't understand.

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, de-stroying 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 com-puters 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 re-gions 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 rela-tively low cost. Communication satellites can transmit data around the world cheaply and immediately, and modern 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.