The volunteers were so kind that they devoted most of the time _____ the disabled.

A. to help
B. helped
C. helping
D. to helping
D
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科目：高中英語 來源：浙江省期中題 題型：單選題

The volunteers were so kind that they devoted most of the time _____ the disabled.
[     ]
A. to help
B. helped
C. helping
D. to helping

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