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 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 help .to be ,D helping ,being

B,devote to doing 所以选to helping
be considered to be 意思是被认为是.

b