单项选择题

About 20 of the passengers who were injured in a plane crash are said to be in ______ condition.

A．decisive
B．urgent
C．vital
D．critical
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单项选择题
In 1991, while the economies of industrialized countries met an economic ______ , the economies of developing countries were growing very fast.
A．revival
B．repression
C．recession
D．recovery
单项选择题
The destruction of the twin towers ______ shock and anger throughout the world.
A．summoned
B．tempted
C．provoked
D．stumbled
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