单项选择题

A．15.
B．20.
C．18.
D．16.
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单项选择题
A．Italy.B．Several European countries.C．Spain.D．Franc
A．Italy.
B．Several European countries.
C．Spain.
D．Franc
单项选择题
A．Doctor and patient.B．Lawyer and client.C．Dentist and patient.D．Bank clerk and customer.
A．Doctor and patient.
B．Lawyer and client.
C．Dentist and patient.
D．Bank clerk and customer.
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