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單項選擇題One of the is sues that have to be resolved in an export transaction is the currency to（）in the payment clause.

A.In
B.On
C.With
D.At

1.單項選擇題Shipment will be effected this month，subject to your L/C（）us in one week.

A.reaching
B.reaches
C.will reach
D.has reached

2.單項選擇題You must be responsible for all the losses arising from your delay in opening the（）L/C.

A.covering
B.covered
C.paying
D.paid

3.單項選擇題Please reply to our inquiry（）your earliest convenience.

A.by
B.upon
C.for
D.at

4.單項選擇題It’s our recommendation that the buyer（）an irrevocable L/C.

A.opens
B.open
C.opening
D.establishes

5.單項選擇題I appreciate（）the opportunity to visit your factory.

A.having been given
B.to have been given
C.having given
D.to have given