It was ________ that we tried to make him change his mind.A．paid offB．in vainC．t_刷题宝

题干

It was ________ that we tried to make him change his mind.

A．paid off	B．in vain
C．took off	D．in effect

上一题下一题 0.64难度单项选择更新时间:2015-11-17 07:07:23

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