We ___ our lives had it not been for the policeman.

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We ___ our lives had it not been for the policeman.
A.would have lost B.should lose C.might lose D.could have lost
为什么不能选D

这里显然要用虚拟语气,即 A 或 D (B 和 C不是虚拟语气).从语法上来讲,选A 或 D 都没错,但意思不一样.选 A 表达：如果没有警察的话,我们“必死无疑”；选 D 表达：XXX,我们“可能会死”.
所以从意思上看,我觉得选 A 更恰当些.
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