Timehehasdevotedinthepasttenyears         thedisableis...

問題詳情：

 Time he has devoted in the past ten years          the disable is now considered           of great value.

A. to help; being              B. to helping; to be       

C. to help; to be               D. helping; being

【回答】

  B

知識點：非謂語動詞

題型：選擇題