Whenever I was in trouble, he would do what he could ________ me.
A.help
B.helping
C.tohelp
D.helped
网友回答
C解析试题分析：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。