Though they are far away from school the children who live in mountains go to school on

问题补充：

Though they are far away from school, the children who live in mountains go to school on foot.

A. ever

B. always

C. never

D. hardly ever

答案：

A. ever

(答案→)B. always

C. never

D. hardly ever

解析：ever曾经，永远；always一直，总是；never从来不，永远不；hardly ever几乎从来不。句意；尽管他们离学校很远，这些住在山里面的孩子们总是步行去学校。结合语境可知选B。