单项选择题

This city made ______ progress in such a short time.

A．remarkable
B．gradual
C．sufficient
D．essential
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单项选择题
When ______ through a circuit, the current will lose part of its energy.
A．flowing
B．being flowed
C．flowed
D．having flown
单项选择题
The rest of his life is ______ to the cause of international exchange of visiting scholars.
A．added
B．put
C．saved
D．committed
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