单项选择题

The football player had studied economics in the university for ______ of roughly six years.

A．a decade
B．a time
C．an age
D．a period
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A．showedB．showsC．showD．had shown
A．showed
B．shows
C．show
D．had shown
单项选择题
A．adeptnessB．adaptationC．adoptionD．adaptability
A．adeptness
B．adaptation
C．adoption
D．adaptability
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