问题
选择题
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
答案
答案：B
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。