Most scientists seem to agree that ________ certain limit should be set on _____

题干

Most scientists seem to agree that ________ certain limit should be set on ______
sale of cars to ease air pollution.

A．a; the

B．/; the

C．the; /

D．the; the

上一题下一题 0.94难度单项选择更新时间:2013-06-18 09:53:14

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