He has devoted most of his time and energy a cure for the disease.A. findB. findingC. to

问题补充：

He has devoted most of his time and energy a cure for the disease.

A. find

B. finding

C. to find

D. to finding

答案：

A. find

B. finding

C. to find

(答案→)D. to finding

解析：考查固定词组。固定词组devote some time to sth/doing sth致力于做某事；花费时间做某事；其中的to是介词，后面使用名词或者动名词做宾语。句意：他已经把大部分的时间和精力用于寻找这种疾病的治愈方法。故D正确。