单项选择题

To understand the situation completely requires more thought than ______ thus far.

A．be given
B．is given
C．has been given
D．has given
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单项选择题
He claimed to be a scholar but was not ______.
A．this
B．so
C．such
D．that
单项选择题
When he was waken by some strange noise, he found himself, to his astonishment, surrounded by a ______ of wolves.
A．herd
B．school
C．flock
D．pack
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