单项选择题

In order to be more productive and efficient, the board decided to ______ a sound system of operation.

A．institute
B．inspire
C．infer
D．induct
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单项选择题
John used to be such a computer buff that he spent a large part of his income ______ his computer whenever a new CPU was introduced.
A．imbibeing
B．modifying
C．increasing
D．upgrading
单项选择题
The young artist had not expected to find such an idem attic in that ______ building, which had been abandoned several years earlier by a sewing machine manufacturer.
A．run-off
B．run-down
C．run-about
D．run-away
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