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

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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  
When manufacturing many different products,people commonly use natural gas______.

选项

答案E

解析 文章第二段倒数第二句指出,除了家庭取暖外,在美国大部分天然气被作为原材料来生产多种产品,从涂料到服装纤维,到应用于保健、计算机和室内装饰的塑料。E项as a raw material(作为原料)与原句意思相符,故选E。
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