单项选择题

A．The weakness of the price system.
B．The complexities of the price system.
C．Credit terms in transactions.
D．Resource allocation and the public service
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单项选择题
A．Whether the woman needs his help.B．Whether the woman has any pets.C．Where the woman is going.D．Whether the woman can take care of his pet.
A．Whether the woman needs his help.
B．Whether the woman has any pets.
C．Where the woman is going.
D．Whether the woman can take care of his pet.
单项选择题
A．Colleagues.B．Boss-Employee.C．Student-librarian.D．Lawyer-Client.
A．Colleagues.
B．Boss-Employee.
C．Student-librarian.
D．Lawyer-Client.
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