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With the world’ s population estimated to grow from six to nine billion by 2050, researchers, businesses and governments are alr
With the world’ s population estimated to grow from six to nine billion by 2050, researchers, businesses and governments are alr
admin
2019-03-08
40
问题
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 and jobs. Underling all this【C6】______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【C7】______, sustainable way is the cornerstone of our nation’ s energy security, and will be one of the major【C8】______of the 21st century. Alternative forms of energy-bio-fuels, wind and solar, to name a few are【C9】______being funded and developed, and will play a growing【C10】______in the world’ s energy supply. But experts say that even when【C11】______, alternative energy sources will likely meet only about 30% of the world’ s energy needs by 2050.
For example, even with【C12】______investments, such as the $ 93 million for wind energy development【C13】______in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels【C14】______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【C15】______both traditional and alternative.
[A]consist[B]solutions[C]certainly
[D]stable[E]comprise[F]competitions
[G]exactly[H]growth[I]included
[J]role[K]progress[L]marvelous
[M]challenges[N]combined[O]significant
【C15】
选项
答案
B
解析
由空格前的a lot of可知,空格处需填入名词。结合前文的the answer to…“解决……的方法”可知,B选项solutions“解决方法,处理手段”符合语意,为正确答案。
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公共英语(PETS)
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