Whenever I was in trouble, he would do what he could me.
A. help
B. helping
C. tohelp
D. helped
网友回答
A. help
B. helping
(答案→)C. tohelp
D. helped
解析：本题考查固定句式。“尽其所能去做某事；尽力做某事”可用do what one can to do或do everything(that) one can to do或do all(that) one can to do等句式来表达，can后面省略了do，此时不定式作目的状语。答案：C