Luckily, the people there did help him.
A. that they could
B. which they could to
C. what they could
D. what they could to
网友回答
A. that they could
B. which they could to
C. what they could
(答案→)D. what they could to
解析：考查句子结构。本题中what they could后面省略了do，形成宾语从句what they could do作为动词did的宾语。后面的不定式to help him在句中做目的状语。句意：幸运地是，那里的人们做了他们能做的所有事情来帮助他。巩固D正确。