单项选择题

My father is so deaf that he has to use a heating ______.

A．help
B．aid
C．support
D．tool
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单项选择题
The small mountain village was ______ by the snow for more than one month.
A．cut back
B．cut out
C．cut off
D．cut away
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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