He devoted all his time he had _____ others.A．to helpB．helpingC．to helpingD．hel_刷题宝

题干

He devoted all his time he had _____ others.

A．to help	B．helping
C．to helping	D．helped

上一题下一题 0.65难度单选题更新时间:2014-12-02 08:50:33

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