Theywereabroadduringthemonthswhenwewerecarryingouttheinvestigation，ortheytoourhelp．（）A.wouldhavecomeB.couldcomeC.havecomeD.hadcome

Question

They were abroad during the months when we were carrying out the investigation，or they _____ to  our help．（　　）

A. would have come

B. could come

C. have come

D. had come

Answer 1

答案：A．根据题干中的or可知其引导的是含蓄虚拟条件句，相当于if引导的虚拟条件句．根据句中they were abroad的were可知事情发生在过去，所以or引导的含蓄条件句是对过去情况的假设，所以谓语动词形式应为would/could/might/should have done．故选A．