◎ 题干
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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Most scientists seem to agree that _____ certain limit should be set on _____ consumption of cars to ease air pollution.[ ]A. a; theB. /; theC. the; /D. …”主要考查了你对  【不定冠词】【定冠词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。