We the manager , but no one the telephone number .
A. could have called ; knew
B. could have called ; had known
C. could call ; had known
D. could call ; knew
网友回答
(答案→)A. could have called ; knew
B. could have called ; had known
C. could call ; had known
D. could call ; knew
解析：虚拟语气题。but为暗含的条件相当于if we had known the telephone number。 我们本可以打电话给经理但是没人知道号码。 选A