Theory is based on practice and ________ serves practice. A．in turnB．by and by C_刷题宝

题干

Theory is based on practice and ________ serves practice.

A．in turn	B．by and by
C．by chance	D．in this case

上一题下一题 0.85难度单项选择更新时间:2010-07-10 03:00:34

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