单项选择题

The young man who saw the car ______ into the river telephoned the police.

A．plunged
B．plunge
C．was plunging
D．to plunge
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单项选择题
When the new assembly line is complete, the factory will turn ______ one thousand cars per day.
A．in
B．off
C．out
D．over
单项选择题
The Canadian unions tend to strive for wage parity, with their counterparts in the United States.
A．equality
B．promotion
C．criterion
D．stipulation
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