单项选择题

The police were given an order that the stolen documents must be recovered at all ______.

A．accounts
B．conditions
C．payments
D．costs
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单项选择题
This new instrument is far superior ______ the old one we bought three years ago.
A．than
B．to
C．over
D．of
单项选择题
Having finished the letter, he ______ it carefully and sealed the envelop with a kiss.
A．folded
B．bent
C．turned
D．equipped
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