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單項選擇題

We find （）necessary to stress the importance of making punctual shipment within the validity of the L/C.

A.how
B.that
C.it
D.us

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單項選擇題

We regret （） that we can’t accept your offer.

A.of saying
B.for saying
C.about saying
D.to say

單項選擇題

（） quality and prices are satisfactory, there are prospects of good sales here.

A.Provided
B.Even
C.Though
D.Unless

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