单项选择题

______ management is one of the factors which will lower production cost.

A．Effective
B．Efficient
C．Sufficient
D．Inefficient
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单项选择题
It's harmful to one's health to _______ smoking and drinking.
A．take on
B．take in
C．take to
D．take off
单项选择题
The doctors ______ the medicines to the people in the flood area.
A．distributed
B．allotted
C．spread
D．scattered
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