The old lady devoted her lifetime the homeless children.A. to helpB. to helpingC. helping

问题补充：

The old lady devoted her lifetime the homeless children.

A. to help

B. to helping

C. helping

D. for help

答案：

A. to help

(答案→)B. to helping

C. helping

D. for help

解析：考查非谓语动词。短语devote to将……奉献给，to是介词，后接名词或者动名词。句意：这位老人将他的一生奉献给无家可归的孩子们。故选B。