单项选择题

A．To introduce the categories of books in the US libraries.
B．To explain roles of different US libraries.
C．To define the circulation system of US libraries.
D．To demonstrate the importance of US libraries.
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单项选择题
A．In an office.B．In a supermarket.C．In an hospital.D．In a classroom.
A．In an office.
B．In a supermarket.
C．In an hospital.
D．In a classroom.
单项选择题
A．The number of their accounts.B．Withholding client information.C．Being mysterious to the outsiders.D．Attracting wealthy foreign clients.
A．The number of their accounts.
B．Withholding client information.
C．Being mysterious to the outsiders.
D．Attracting wealthy foreign clients.
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