The time Dr. Wang has devoted _____ the disabled in the past five years is now considered_____of great value.
A.helping; being | B.helps; to be | C.to helping; to be | D.to helping; being |
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The time Dr. Wang has devoted _____ the disabled in the past five years is now considered_____of great value.
A.helping; being | B.helps; to be | C.to helping; to be | D.to helping; being |