问题补充：
The time he has devoted in the past years the disabled is now considered of great value.
A. to help; being
B. to help; to be
C. to helping; to be
D. helping; /
答案：
A. to help; being
B. to help; to be
(答案→)C. to helping; to be
D. helping; /
解析：考查devote和consider的用法，devote time to doing sth意思“花费时间做某事”，consider to do sth意思“考虑做某事”，所以选C
