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
If you rub certain things together, their surfaces become ______ static electricity.
A．caught up with
B．charged with
C．kept up with
D．put up with
单项选择题
During these ten years, many new methods have been ______ in the field of foreign language teaching.
A．adopted
B．adapted
C．alarmed
D．aided
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