Never before in our country _______________.A．has such a thing happenedB．such a

题干

Never before in our country _______________.

A．has such a thing happened	B．such a thing has happened
C．has so a thing happened	D．so a thing has happened

上一题下一题 0.4难度单项选择更新时间:2015-04-03 10:07:00

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