You can’t imagine the difficulty he ____

问题选择题

You can’t imagine the difficulty he _____ onto the cliff and saving the boy in trouble.

A．had to climb

B．had climbed

C．had climbing

D．had on climbing

答案

答案：C

考查定语从句和非谓语动词。句意：你不能想象出他爬上悬崖就这个陷入困境的男孩的困难。he had做后置定语修饰difficulty，现在分词作伴随状语表示正在进行的伴随性动作，和he是逻辑上的主谓关系。故选C。