单项选择题

The survival of historic interests as we know it is ______ threat.

A．under
B．upon
C．within
D．towards
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单项选择题
Every member of the original cast was signed ______ her.
A．in addition to
B．except
C．except for
D．besides
单项选择题
______ with the hardship confronted with by the Red Army, the difficulty you're facing is insignificant.
A．When compared
B．Compare
C．While comparing
D．Comparing
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