单项选择题

Which of these possible factors leading to greater productivity is not true

A．To make jobs more varied.
B．To give the worker freedom to do his job in his own way.
C．Degree of work contribution.
D．Demands for longer working hours.

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单项选择题

A．Cello.B．Viola.C．Violin.D．Bass.

A．Cello.
B．Viola.
C．Violin.
D．Bass.

单项选择题

What was the response by consumers

A．Consumers were responsible.
B．Consumers were hostile.
C．Consumers didn' t care all the time.
D．Consumers got tired of it.