单项选择题

There is an abundant supply of cheap labor in this country.

A．a steady
B．a plentiful
C．an extra
D．a stable
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单项选择题
There is always excitement at the Olympic Games when an athlete breaks a previous record of performance.
A．beats
B．matches
C．maintains
D．announces
单项选择题
Many people complain of the rapid rhythm of modem life.
A．rate
B．speed
C．pace
D．density
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