Unit 5 The power of nature 一、阅读理解
（2010· 上海· C） The 2012 London Olympics had enough problems to worry about. But one more has just been added—a communications blackout caused by solar st
orms. After a period of calm within the Sun, scientists have detected the signs of a fresh cycle of sunspots that could peak in 2012, just in time for the arrival of the Olympic torch in London. Now scientists believe that this peak could result in vast solar explosions that could throw billions of tons of charged matter towards the Earth, causing strong solar storms that could jam the telecommunications satellites and internet links sending live Olympic broadcast from London. “The Sun’s activity has a strong influence on the Earth. The Olympics could be in the middle of the next solar maximum which could affect the functions of communications satellites,” said Professor Richard Harrison, head of space physics at the Rutherford Appleton Laboratory in Oxfordshire. At the peak of the cycle, violent outbursts called coronal mass ejections (日冕物质抛射) occur in the Sun’s atmosphere, throwing out great quantities of electrically-charged matter. “A coronal mass ejection can carry a billion tons of solar material into space at over a million kilometres per hour. Such events can expose astronauts to a deadly amount, can disable satellites, cause power failures on Earth and disturb communications,” Professor Harrison added. The risk is greatest during a solar maximum when there is the greatest number of sunspots. Next week in America, NASA is scheduled to launch a satellite for monitoring solar activity called the Solar Dynamics Observatory (SDO), which will take images of the Sun that are 10 times clearer than the most advanced televisions available. The Rutherford Appleton Laboratory helped to make the high-tech cameras that will capture images of the solar flares (太阳耀斑) and explosions as they occur. Professor Richard Holdaway, the lab’s director, said that the SDO should be able to provide early warning of a solar flare or explosion big enough to affect satellite communications on Earth. “If we have advance warning, we’ll be able to reduce the damage. What you don’t want is things switching off for a week with no idea of what’s caused the problem,” he said. 72. The phrase “communications blackout” in Paragraph 1 most probably refers to _________ during the 2012 Olympics. A. the extinguishing of the Olympic torch B. the collapse of broadcasting systems C. the transportation breakdown in London D. the destruction of weather satellites 73. What can be inferred about the solar activity described in the passage? A. The most fatal matter from the corona falls onto Earth. B. The solar storm peak occurs in the middle of each cycle. C. It takes several seconds for the charged matter to reach Earth. D. The number of sunspots declines after coronal mass ejections. 74. According to the passage, NASA will launch a satellite to______. A. take images of the solar system
B. provide early warning of thunderstorms C. keep track of solar activities D. improve the communications on Earth 75. Which of the following might be the best title of the passage? A. Solar Storms: An Invisible Killer B. Solar Storms: Earth Environment in Danger C. Solar Storms: Threatening the Human Race D. Solar Storms: Human Activities to Be Troubled （2010· 辽宁卷· A） It was a village in India. The people were poor. However, they were not unhappy. After all, their forefathers had lived in the same way for centuries. Then one day, some visitors from the city arrived. They told the villagers there were some people elsewhere who liked to eat frog’s legs. However, they did not have enough frogs of their own, and so they wanted to buy frogs from other places. This seemed like money for nothing. There were millions of frogs in the fields around, and they were no use to the villagers. All they had to do was catch them. Agreement was reached, and the children were sent into the fields to catch frogs. Every week a truck arrived to collect the catch and hand over the money. For the first time, the people were able to dream of a better future. But the dream didn’t last long. The change was hardly noticed at first, but it seemed as if the crops were not doing so well. More worrying was that the children fell ill more often, and, there seemed to be more insects around lately. The villagers decided that they couldn’t just wait to see the crops failing and the children getting weak. They would have to use the money earned to buy pesticides(杀虫剂) and medicines. Soon there was no money left. Then the people realized what was happening. It was the frog. They hadn’t been useless. They had been doing an important job—eating insects. Now with so many frogs killed, the insects were increasing more rapidly. They were damaging the crops and spreading diseases. Now, the people are still poor. But in the evenings they sit in the village square and listen to sounds of insects and frogs. These sounds of the night now have a much deeper meaning. 56. From paragraph 1 we learn that the villagers ________. A. worked very hard for centuries B. dreamed of having a better life C. were poor but somewhat content D. lived a different life from their forefathers 57. Why did the villagers agree to sell frogs? A. The frogs were easy money. B. They needed money to buy medicine. C. They wanted to please the visitors. D. The frogs made too much noise. 58. What might be the cause of the children’s sickness? A. The crops didn’t do well. B. There were too many insects.
C. The visitors brought in diseases. D. The pesticides were overused. 59. What can we infer from the last sentence of the text? A. Happiness comes from peaceful life in the country. B. Health is more important than money. C. The harmony between man and nature is important. D. Good old days will never be forgotten.
potential 1. (2012· 浙江卷· T10)The research lacks _______ evidence, and therefore,its conclusions are doubtful. A.solid B.fierce C.severe D.potential anxious 2. (2010· 天津卷· Ｔ5) People have always been ________ about exactly how life on earth began. A. curious B. excited C. anxious D. careful panic 3. （2011?湖北卷? T21） “Tommy, run! Be quick! The house is on fire!” the mother shouted, with ______ clearly in her voice. A. anger B. rudeness C. regret D. panic 动词—ing 形式的完成时态 4. (2012· 重庆卷· T23)___________ to work overtime that evening, I missed a wonderful film. A.Having been asked B.To ask C.Having asked D.To be asked 5. (2010· 湖南卷· T26)Dina, _________ for months to find a job as a waitress, finally took a position at a local advertising agency. struggling B. struggled C. having struggled D. to struggle 独立主格结构 6.(2012· 全国卷Ⅰ · T28)The party will be held in the garden, weather ___________. . A.permitting B.to permit C.permitted D.permit 7.（2011?浙江卷?T3）Bats are surprisingly long-lived creatures, some ________a life span of around 20 years. A. having B. had C. have D. to have