Question

We didn't know his telephone number, otherwise we _________ him.

A. would have telephoned         B. must have telephoned

C. would telephone               D. had telephoned

Answer

A

【解析】

试题分析：考查含蓄虚拟语气。本句中的虚拟是通过副词otherwise“否则，要不然”表现出来的。句意：我不知道他的电话号码，否则，我就会打电话给他。本句中的otherwise相当于条件句If I had known his telephone number，因为这是与过去相反的虚拟语气，所以主句使用“情态动词+have+done”的形式。Must have done一定做了某事，这是对过去所发生事情的肯定推测。故A正确。

考点：考查含蓄虚拟语气