2. 外语
  3. A．over the past 50 years B．beneath the earth’s surface C．by more than 50 percent D．for more than four decades E．as a raw mat

A．over the past 50 years B．beneath the earth’s surface C．by more than 50 percent D．for more than four decades E．as a raw mat

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问题 A．over the past 50 years
B．beneath the earth’s surface
C．by more than 50 percent
D．for more than four decades
E．as a raw material
F．for home energy needs  
It is estimated that by 2025 the natural gas demand in the United States will increase______．
选项
答案C
解析 文章第四段最后一句指出，据美国能源信息部预测，到2025年天然气需求将上升50%多。C项by more than 50 percent(50%多)与原句意思相符，故选F。
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