Most scientists seem to agree that certain limit should be set on consumption of cars to e

问题补充：

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：

(答案→)A. a；the

B. /；the

C. the；/

D. the；the

解析：考查冠词：句意：大多数科学家似乎同意要对汽车的消费设置一定的限制来缓解空气污染。第一空填a，因为limit是可数名词，a certain limit一定的限制，第二空填the，是特指“汽车的消费”，所以选A。