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

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

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

点击查看答案

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

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

点击查看答案