The time he has devoted in the past years ______ the disabled is now considered ______ of great value.
A. to help; being B. to helping; to be C. to help; to be D. helping; being
The time he has devoted in the past years ______ the disabled is now considered ______ of great value.
A. to help; being B. to helping; to be C. to help; to be D. helping; being
B