Question

Some people fear that ________ air pollution may bring about changes in _______ weather around the world.

A. /; the                 B. the; /                C. an; the                D. the; a 

Answer 1

A

解析:

Air pollution 是抽象名词这里是泛指，weather 这里是特指全球的气候，根据the weather around the world 可知。