单项选择题

Not until she arrived at the meeting room______ she had forgotten to bring the document.

A．she realized
B．did she realize
C．she did realize
D．does she realize
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Would you please pass me the book______ cover is black
A．which
B．whose
C．that
D．its
单项选择题
We are happy at the good news______ Mr. Black has been awarded the Best Manager.
A．that
B．which
C．what
D．whether
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