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 meager
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单项选择题
Writing is a slow process,requiring plenty of thought, time and effort。
A．significant
B．considerable
C．enormous
D．numerous
单项选择题
Jack eventually overtook the last truck.
A．hit
B．passed
C．reached
D．led
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