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2011年12月大学英语四级考试阅读真题及答案

2014-12-05 11:46:35来源：网络

　　Section A

　　With the world’s population estimated to grow from six to nine billion by 2050, researchers, businesses and governments are already dealing with the impact this increase will have on everything from food and water to infrastructure an jobs. Underlying all this 47________ will be the demand for energy, which is expected to double over the next 40 years.

　　Finding the resources to meet this demand in a 48________, sustainable way is the cornerstone of our nation’s energy security, and will be one of the major 49________ of the 21st century. Alternative forms of energy --- bio-fuels, wind and solar, to name a few --- are 50________ being funded and developed, and will play a growing 51________ in the world’s energy supply. But experts say that, even when 52________, alternative energy sources will likely meet only about 30% of the world’s energy needs by 2050.

　　For example, even with 53________ investments, such as the $93 million for wind energy development 54________ in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels 55________ only about 1% of the market today.

　　Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of 56________ --- both traditional and alternative.

　　A stable B solutions C significant D role E progress

　　F marvelous G included H growth I exactly J consist

　　K comprise L competitions M combined N challenges O certainly

　　查看参考答案

　　47. N) challenges

　　48. A) stable

　　49. E) progress

　　50. O) certainly

　　51. D) role

　　52. M) combined

　　53. C) significant

　　54. G) included

　　55. K) comprise

　　56. B) solutions

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