Question

They were abroad during the months when we were carrying out the investigation, or they _____ toour help.

A. would have come         B. could come

C. have come               D. had come

Answer

A

【解析】

试题分析：这里when引导的是定语从句，修饰前面的名词months;根据谓语动词were可知事情发生过去，or后是对过去的虚拟，所以应该用would have done，故选A。句意：在我们进行调查期间他们在国外，要不然的话他们就来帮忙。

考点：考查虚拟语气。

【名师点睛】本题与2015年安徽卷第32题类似.It is lucky we booked a room, or wewould have nowhere to stay now. 本题考查含蓄虚拟语气和错综时间虚拟语气。常见的是if引导的虚拟条件句，由otherwise, or, without等引出的相反的情况被称为“含蓄虚拟语气”。or引出相反的情况，对过去虚拟，主句用would+have done，表示与过去相反，不难选出正确答案。