单项选择题

They demand to set up an organization flexible enough to cope with any emergency.

A．portable
B．valiant
C．trivial
D．mobile
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单项选择题
To their great surprise, they found the floodwater had damaged the building's foundation.
A．underlain
B．underlined
C．undertaken
D．undermined
单项选择题
In this monumental work the entire storehouse of the world's art is surveyed.
A．impressive
B．expressive
C．progressive
D．possessive
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