单项选择题

We are convinced ________ the righteousness of our cause.

A．of
B．on
C．over
D．at
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单项选择题
Since the father died a year ago, there has been ________ in the family about the division of the estate.
A．distinctions
B．discord
C．disadvantages
D．disappointment
单项选择题
Urban congestion would greatly be relieved if the ________ charged on public transport Were more reasonable.
A．prices
B．tickets
C．fees
D．fares
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