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单项选择题

How much does the man need to pay for one room per night

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单项选择题A．A．ought B．B．shall C．C．will

A．A．ought
B．B．shall
C．C．will

单项选择题The questionnaire on your service should be issued to your customers

A．whenever you think is necessary．
B．periodically．
C．as frequently as possible．