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
Unless all the members agree to ______ to the plan there may be further development in the course of action.
A．tumble
B．stick
C．come
D．adjust
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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