Most scientists seem to agree that _______ certain limit should be set on _______consumption of cars to ease air pollution．
A．a(chǎn); the B．/;the C．the; / D．the; the
A
考察冠詞用法。第一空表示泛指，a certain limit相當(dāng)于some limit意為某種限制， 第二空是特指，特指車輛的消費，
句意為，大部分科學(xué)家似乎都同意應(yīng)當(dāng)對汽車的消費設(shè)定某種限制，為了減輕空氣污染。
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