It was in that small room ______ they worked hard and dreamed of better days to come.
A. that B．where C．in which D．which
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I remember ______ (take)to Beijing when I was a child．
试述淤血、缺血、血栓形成、栓塞及梗死之间的相互关系。
He will come to call on you the moment he ______ his painting．
A. will finish B．finished C．has finished D．had finished
We can hardly avoid making any mistakes in our work, ______ hard we try.
A. whatever B．how C．however D．no matter
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