The time he has devoted in the past ten 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 |
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The time he has devoted in the past ten 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 |