单项选择题

Some companies have introduced flexible working time with less emphasis on pressure ______.

A．than more on efficiency
B．and more on efficiency
C．and more efficiency
D．than efficiency
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单项选择题
Bread and butter ______ . liked by Westerners.
A．is
B．are
C．were
D．be
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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