Most scientists seem to agree that ________ certain limit should be set on________ consumption(消費) of cars to ease air pollution.

A.a; the B．/; the

C．the; / D．the; the

 

A

【解析】A 考察冠詞。第一空a certain=some；第二空加定冠詞表示特指。句義：許多科學(xué)家傾向于同意為了減輕空氣污染，應(yīng)該對汽車消費設(shè)定一些限制。

 

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