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完形填空。阅读下面短文，掌握其大意，然后从各题所给的四个选项A、B、C和D中，选出最佳答案。 Report was published about what the earth might be like 20 years from then on. The report was a result of a three-year ___1___. According to the report, the picture of the earth in the year 2010 is not a ___2___ one. The world will be more ___3___ because the population will continue to grow. The population could be ___4___ 6 300 million, almost 2 150 million more than in 1985. More people would move into cities, especially cities in ___5___ countries. Cities like Cairo and Jakarta probably would ___6___ have 15 million by then. Food production will ___7___, but not enough to feed all the people. Farmers will grow 90% more food than they did in 1985, ___8___ most of the increase would be in countries that ___9___ produce enough food for their people. Little increase is ___10___ in South Asia, Africa and the Middle East. Poor farming ways are ___11___ large areas of crop land, changing farms into deserts. More farmland is ___12___ as cities become larger and more houses are built. ___13___ will get worse as industrial countries burn more coal and oil. Many of the world’s ___14___ could disappear as more and more trees are cut down. Energy will continue to be a serious problem. The experts say their picture of the earth for the year 2010 ___15___. They only carried out the situation that ___16___ today. By changing the situation, by ___17___ the problems, the picture can be changed. There is ___18___ time for the nations of the world to work ___19___ a plan of action. But they warned that ___20___ too long to make decisions would greatly reduce the chances of success. | 
