Question

【题目】After a short rest, the young climber kept on _____ the mountain.

A. climb B. climbs C. climbed D. climbing

Answer 1

【答案】D

【解析】

句意：在休息了一段时间，那个年轻的爬山者一直爬山。A. climb爬山；原形；B. climbs爬山，第三人称单数；C. climbed爬山，过去式；D. climbing爬山，现在分词。短语keep on doing sth.表示一直做某事。根据题意，故选D。