【题目】Without the timely arrival of the rescuers, twenty miners ______ underground yesterday.
A.would have been trapped
B.would be trapped
C.were trapped
D.had been trapped

【答案】A
【解析】考查虚拟语气。句意：昨天，如果没有救援者的及时到达，20位矿工就会被困在地下。与过去事实相反，主句谓语动词would/should/could/might + have done，所以选A。