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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单项选择题
The water in the pool is as ______ as a mirror.
A. smooth
B. flush
C. plane
D. even
单项选择题
He claimed to be a scholar but was not ______.
A. this
B. so
C. such
D. that
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