单项选择题

A．5 gms.
B．10 gms.
C．15 gms.
D．50 gms.
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单项选择题
A．Salesman and customer.B．Lawyer and client.C．Manager and shop assistant.D．Guide and tourist.
A．Salesman and customer.
B．Lawyer and client.
C．Manager and shop assistant.
D．Guide and tourist.
填空题
matching
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