It is _____ problem that none of us can work it out.A．so difficultB．such difficu_刷题宝

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It is _____ problem that none of us can work it out.

A．so difficult	B．such difficult a
C．such difficult	D．so difficult a

上一题下一题 0.65难度单项选择更新时间:2019-01-16 06:17:36

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