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
Quality of the present shipment is equal to ______ of last consignment.
A．this
B．these
C．that
D．those
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