单项选择题
To qualify for a promotion, （）to exceed the quota.
A.the best thing he could do was B.he did his best C.all he could do was D.his best thing was
单项选择题 Your firm has been recommended to us by AMK company, （） we have done business for many years.
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.
