【文章內(nèi)容簡(jiǎn)介】 all business documents. 48． Where would this passage most likely appear? A． In a magazine specially for women. B． In a restaurant and hotel guide. C． In a news magazine. D． In a journal for topranking businessmen and women. C TUVALU, a tiny country in the Pacific Ocean, has asked for help as it fears it will be swallowed up by the sea. Storms and huge waves are a constant threat and none of Tuvalu’s nine little islands is more than five meters above sea level. Salt water is already entering the country’s drinking water supply, as well as damaging plants that produce fruit and vegetable. Without urgent help, the country’s days are numbered. But Tuvalu is not the first place to face sinking into the sea． Venice, a historic city in Italy best known for its canals, has sunk about 24 cm over the past 100 years. Experts say that it will have sunk another 2050 cm by 2050. A century ago, St. Mark’s Square, the lowest point in the city, flooded about nine times a year. Nowadays, it happens more than 100 times. While Venice is slowly sinking into the mud on which it stands, Tuvalu’s rising sea level is caused by global warming. The average global temperature has increased by almost centigrade degrees over the past century。 scientists expect it to rise by extra 13 degrees over the next 100 years. Warmer weather makes glaciers（冰川） melt, adding more water to the ocean. The warmer temperatures also make water expand, so it takes up more space, causing the sea level to rise. The sea level has risen about 1025 cm in the last 100 years. The main cause of global warming is human pollution. Through burning coal, oil and gas, people have been increasing the greenhouse gases in the atmosphere, such as CO2. This adds to the power of the greenhouse effect, making the pla even warmer. Many scientists believe that if the warming is not stopped, there will be huge climate changes. The sea level could rise by one meter this century. Should this e true, the sea will swallow up millions of homes and the world will be flooded with “ climate refugees” looking for somewhere to live. 49． We can infer from the second paragraph that ______ . A． Tuvalu is in danger of being swallowed up by the sea B． all Tuvalu’s islands are about five meters above the sea level C． drinking water in Tuvalu has been destroyed D． Tuvalu is often flooded by storms and waves 50． The author uses Tuvalu and Venice as examples in order to explain ______. A． they are the first places sinking into the sea B． they are both sinking into the mud where they stand C． they will disappear in the future D． their trouble is caused by global warming 51． What does “ climate refugees” mean? A． People who are forced away from their homeland by climate. B． Climate changes. C． Rare animals. D． Climate effect. 52． Which of the following is NOT true according to the passage? A． Tuvalu’s nine little islands are less than five meters above the sea level. B． The average global temperature has risen by 13 centigrade degrees over the past 100 years. C． The warmer temperature causes the sea level to rise. D． There will be huge climate changes unless the warming is stopped. D Some people who find themselves unable to solve a problem react by just giving up. But it is not good to escape from problems by giving up or by making excuses for failures. You may be sure that all young people go through the same difficult process that you are going through: meeting new situations, developing new skills, and testing their abilities. If you are unhappy about something, face it. Try to state the problem in a few words, so that you will know exactly what you are up against. Then see if you can “ put your finger” on the cause of your unhappiness. In many cases, we only “ think” there is no solution to a particular problem. But often we can overe the problem and achieve the goal by making a direct attack. For example, a boy wanted to be a debater (辯論家 ). When he tried out for the debating team as a freshman, the coach thought he was hopeless. He was shy。 he had a highpitched voice。 and his posture（體態(tài)） was poor. Although he was given little hope of success, he took advantage of every opportunity to debate. He studied successful speakers and sized up(估計(jì) ...的大小 ) his own weaknesses and assets. Then he spent many hours learning all the facts on the topics for debate, and worked at developing good posture and at speaking clearly. By his junior year, he made the school debating team, and in his senior year he was on the winning team in his state. He achieved his goal because he had made a direct attack upon his problem. Although direct attack is often the best way to meet problems, we have to be realistic in judging situations. Sometimes it is necessary to change either the tactics（策略） or the goal. A boy who wants to be a great football player may be too light and not quite fast enough for football. In this situation, being a great football player may