单项选择题

A．Tourist and guider.
B．Waiter and customer
C．Patient and doctor.
D．Manager and worker.
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单项选择题
A．We offer large orders.B．We can cut down the cost.C．We could make them higher.D．We can lower the price.
A．We offer large orders.
B．We can cut down the cost.
C．We could make them higher.
D．We can lower the price.
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