单项选择题

_________was once regarded as impossible has now become a reality.

A．What
B．That
C．Which
D．As
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单项选择题
So many representatives_________, the conference had to be put off.
A．were absent
B．to be absent
C．being absent
D．had been absent
单项选择题
I believe that every crime,_________ the circumstance, should be severely punished.
A．in spite of
B．because of
C．instead of
D．on account of
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