Question

Most scientists seem to agree that _______ certain limit should be set on _______consumption of cars to ease air pollution．

A．a; the               B．/;the            C．the; /           D．the; the

Answer

A

【解析】考察冠词用法。第一空表示泛指，a certain limit相当于some limit意为某种限制， 第二空是特指，特指车辆的消费，

句意为，大部分科学家似乎都同意应当对汽车的消费设定某种限制，为了减轻空气污染。