We can have bluer sky if we create_ less polluted world.A. a; aB. a; theC. the; aD. the; t

We can have bluer sky if we create_ less polluted world.
A. a; a
B. a; the
C. the; a
D. the; the

(答案→)A. a; aB. a; theC. the; aD. the; the解析：考查冠词：第一空填a，泛指“一片蓝天”，第二空填a，表示“一个污染少点的世界”，句意是：如果我们创造一个污染少点的世界就会拥有一片更蓝的天空。选A。

和我的回答一样，看来我也对了