单项选择题
Your firm has been recommended to us by AMK company, （） we have done business for many years.
A.with whom B.with who C.whom D.who
单项选择题 We find （）necessary to stress the importance of making punctual shipment within the validity of the L/C.
单项选择题 We regret （） that we can’t accept your offer.
单项选择题 （） quality and prices are satisfactory, there are prospects of good sales here.
