He made up his mind to devote all he could to the poor.A. helpB. helpingC. helpedD. helps

问题补充：

He made up his mind to devote all he could to the poor.

A. help

B. helping

C. helped

D. helps

答案：

A. help

(答案→)B. helping

C. helped

D. helps

解析：句中all后he could后省略了do，此处to是介词，故其后用动名词。故选B。句意：他决心奉献他能做的一切帮助穷人。