Yesterday if the policeman earlier, the fight between the two boys would have been prevented.
A. would have arrived
B. had arrived
C. were to arrive
D. arrived
网友回答
A. would have arrived
(答案→)B. had arrived
C. were to arrive
D. arrived
解析：考查虚拟语气。根据语境为对过去事实相反的虚拟语气，故从句用had + v-ed，故选B。句意：昨天如果警察早点到，两个男孩之间的打斗就会被阻止。