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【題目】 ______rise in carbon dioxide is causing _______ steady increase in global warming.

A. The; a B.不填; a C. The;不填 D.A；the

【答案】A

【解析】

試題分析：句意：二氧化碳增多正在導致全球持續(xù)變暖。第一空名詞rise后面有介詞短語in carbon dioxide修飾，說明該詞表示特指，所以使用定冠詞the；第二空使用a表示泛指。故A正確。

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