问题
选择题
We ________ our lives had it not been for the policeman.
A．would have lost
B．should lose
C．might lose
D．had lost
答案
答案：A
因为had it not been for the policeman =" if" it had not been for the policeman (如果没有警察) ，显然是与过去事实相反的情况，主句中的谓语应是would have lost。