He has given me so much help that I really want to do something for him ______._刷题宝

题干

He has given me so much help that I really want to do something for him ______.

A．in turn	B．by turns
C．in return	D．in answer.

上一题下一题 0.64难度单项选择更新时间:2014-01-21 04:40:11

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