单项选择题

David is the ________ holder of the world 5,000-meter world record but there is no guarantee that he will win in the Olympic Games.

A．current
B．predominant
C．prevailing
D．decisive
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单项选择题
My boss has always attended to the ________ of important business himself.
A．transaction
B．stimulation
C．transition
D．solution
单项选择题
Charles would quit his job to ________ more respectable employment.
A．take up
B．take to
C．take into
D．take over
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