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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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科目:高中英语 来源:浙江省期中题 题型:单选题

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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