He has given me so much help that I really want to do some for him __________.A．_刷题宝

题干

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

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

上一题下一题 0.85难度单项选择更新时间:2017-09-28 03:01:19

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