单项选择题

A．Less than 30 minutes.
B．From 30 to 45 minutes.
C．At least 45 minutes.
D．More than 30 minutes.
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单项选择题
A．To buy goods or obtain services without immediate payment.B．To buy goods directly from a central billing office.C．To obtain services with a check.D．To buy goods with a check.
A．To buy goods or obtain services without immediate payment.
B．To buy goods directly from a central billing office.
C．To obtain services with a check.
D．To buy goods with a check.
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