单项选择题

Business in this area has been ______because prices are too high.

A．slack
B．prosperous
C．optimal
D．serious
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单项选择题
The electronic computer is ______some of the tasks that were once accomplished by our own brains.
A．taking on
B．taking over
C．taking off
D．taking in
单项选择题
My parents want very much to see you, and as we live in a very large house, we could offer you spacious accommodations.
A．criminal
B．pump
C．psychology
D．lodgings
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