单项选择题

The company has retrained its employees to emphasize service and is boasting about the re suits in an ad _________.

A．movement
B．battle
C．operation
D．campaign
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单项选择题
Environmental groups _________ a campaign against the widespread production of genetically modified crops.
A．underwent
B．established
C．regulated
D．launched
单项选择题
This explains why even our most effective efforts to move people into jobs seem never to the welfare rolls.
A．squeeze
B．shrink
C．descend
D．decrease
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