I am very grateful for your assistance, and hope that one day 1 may be able to d

题干

I am very grateful for your assistance, and hope that one day 1 may be able to do something for you__________.

A．in turn	B．in case
C．in return	D．In use

上一题下一题 0.64难度单项选择更新时间:2014-12-08 06:01:33

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