He has devoted all his life ______ the homeless children.A．to helpingB．helpingC．_刷题宝

题干

He has devoted all his life ______ the homeless children.

A．to helping

B．helping

C．to help

D．help

上一题下一题 0.64难度单项选择更新时间:2015-02-04 10:05:35

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