Mary devoted her lifethe sick.A. to care forB. caring forC. to caring for D. to have care

问题补充：

Mary devoted her lifethe sick.

A. to care for

B. caring for

C. to caring for

D. to have cared for

答案：

A. to care for

B. caring for

(答案→)C. to caring for

D. to have cared for

解析：考查词组：devote one’s life to doing致力于做…，句意是：玛丽一生都致力于照顾病人。选C。