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
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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
单项选择题
The competition was intense because there were four parties that planned to ______ for power in the congress.
A．confess
B．contend
C．consist
D．conflict
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