The reader can conclude that___________.A.countries of the world will work to...

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问题 The reader can conclude that___________.
选项 A.countries of the world will work together on pollution problems B.byproducts from wastes lead to a more prosperous marketplace C.science is making great progress on increasing water supplies D.some industries are now making economic use of wastes
答案 D
解析 文章最后一段讲了第二种措施,即to develop an economic use ofthe wastes。倒数第二句“Many industries…are currently converting former waste production into marketable byproducts”说明一些行业已经在利用废物获得经济利益。所以选D。

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