单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A) In a research institute. C) In a zoo.
B) On the beach. D) On the campus.
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单项选择题
A．That there was no effect.B．That it improved operations.C．That operations became less efficient.D．That the employees became dissatisfied.
A．That there was no effect.
B．That it improved operations.
C．That operations became less efficient.
D．That the employees became dissatisfied.
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maintained
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