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
According to the acoustics, continual exposure ______ noise of high intensity would lead to loss of hearing.
A．of
B．with
C．to
D．by
单项选择题
He cannot ______ a ear, for he does not earn much money.
A．obtain
B．afford
C．donate
D．consume
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