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.
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单项选择题
A．Tourist and guider.B．Waiter and customerC．Patient and doctor.D．Manager and worker.
A．Tourist and guider.
B．Waiter and customer
C．Patient and doctor.
D．Manager and worker.
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