问题
选择题
Most scientists seem to agree that ________ certain limit should be set on________ consumption(消费) of cars to ease air pollution.
A．a; the
B．/; the
C．the; /
D．the; the
答案
答案：A
A 考察冠词。第一空a certain=some；第二空加定冠词表示特指。句义：许多科学家倾向于同意为了减轻空气污染，应该对汽车消费设定一些限制。