单项选择题

Every means ______ but without much result.

A．have been tried
B．has been tried
C．have tried
D．has tried
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单项选择题
Finding it difficult to ______ to the climate in the city, he decided to move to the north.
A．fit
B．adopt
C．suit
D．adapt
单项选择题
I saw a traffic ______ this morning.
A．event
B．conflict
C．damage
D．accident
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