单项选择题

Bread and butter ______ . liked by Westerners.

A．is
B．are
C．were
D．be
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单项选择题
Modern ______ perhaps causes more problems than it solves.
A．technique
B．technology
C．tactics
D．tendency
单项选择题
He set up in business ______ his own and was very successful.
A．in
B．of
C．on
D．by
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