单项选择题

A ______ is an occasion at which people who have great knowledge of a particular subject meet in order to discuss a matter of interest.

A．convention
B．congress
C．symposium
D．conference
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单项选择题
We had no computer back-up and had to rely on old paper files to ______ the records we lost.
A．remedy
B．recondition
C．reconstruct
D．register
单项选择题
The policy ______ it necessary for the town s safety to arrest most speeders.
A．narrated
B．elaborated
C．deemed
D．commended
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