单项选择题

It is still not clear what ______ a series of argument between them.

A．contributed
B．marked
C．ignited
D．triggered
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单项选择题
The car one drives may show his her ______ or social position.
A．curiosity
B．status
C．importance
D．reputation
单项选择题
The destruction of rainforests has been ______ as a disaster for the environment.
A．blamed
B．declared
C．condemned
D．appealed
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