问题
选择题
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
答案
答案：A
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