单项选择题

As I regard it, you can widen the ______ of these improvements through your active participation.

A．volume
B．dimension
C．magnitude
D．scope
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单项选择题
If we fail to act now, said Tom, We'll find ourselves ______ in action later on.
A．paid back
B．paid for
C．paid up
D．paid off
单项选择题
That fellow ______ at long distance running.
A．excels
B．exceeds
C．surpasses
D．overtakes
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