单项选择题

A．The best way to make workers more productive.
B．The increase in productivity.
C．The possible factors leading to workers’ greater productivity.
D．The problems in production.
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单项选择题
A．Only the U.K.B．Only China.C．Both the U.S. and China.D．Both the U.K. and China.
A．Only the U.K.
B．Only China.
C．Both the U.S. and China.
D．Both the U.K. and China.
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