Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.A.produci

题目简介

Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.A.produci

题目详情

Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.
A.producingB.having been produced
C.to be producedD.produced
题型:单选题难度:偏易来源:不详

答案

D
此题为非谓语动词的考查,因为carbon dioxide 与produce 之间是动宾关系,所以 用过去分词表示被动。故选D。

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