单项选择题

Our business has been slack ______ three months.

A．in
B．within
C．over
D．for
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单项选择题
In international trade, the term FOB means ______.
A．free on board
B．freight contract
C．freight and cost
D．free carrier
单项选择题
The declaration of import goods shall be made to the Customs by the importer within ______ days from the date of the declaration ot the arrival of the means of trans port.
A．seven days
B．fourteen days
C．fifteen days
D．thirty days
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