the time he has [ ] in the past years to helping the disabled is now considered of great valuea devoted b spent c offered d provided
网友回答
A be devoted to后加名词或动名词,是致力于…的意思
======以下答案可供参考======
供参考答案1:
A devoted to doing
供参考答案2:
a (devote ... to doing sth ) B后不接TO ，C与D后接动词不定式，即TO HELP， （ 不是HELPING）