Question

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

Answer 1

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。