Carbon dioxide ___ from burning fuels is the most common of the so-called greenh
题型:不详难度:来源:
Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.A.producing | B.having been produced | C.to be produced | D.produced |
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答案
D |
解析
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。 |
举一反三
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