单项选择题

You don't have to install this radio in your new car, it's an __________ extra.

A．excessive
B．optional
C．additional
D．arbitrary
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单项选择题
The mayor is a woman with great __________ and therefore deserves our political and financial support.
A．intention
B．instinct
C．integrity
D．intensity
单项选择题
He spoke so ___________ that even his opponents were won over by his arguments.
A．bluntly
B．convincingly
C．Emphatically
D．determinedly
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