From the top of the tower people can see at least distance of 10 kilometers on clear da

问题补充：

From the top of the tower, people can see at least distance of 10 kilometers on clear day.

A. a; the

B. 不填； a

C. a; a

D. the; the

答案：

A. a; the

B. 不填； a

(答案→)C. a; a

D. the; the

解析：考查冠词：第一空填a，a distance of…距离，第二空填a，a clear day一个晴朗的日子，句意：从塔顶，人们在晴朗的日子可以至少看到10公里的距离，选C。