Question

— Did you make it at last?— Yes. But for your help,it _____ a serious loss. A. had ...

— Did you make it at last?— Yes. But for your help,it _____ a serious loss. A. had caused B. must have caused C. would have caused D. may cause

Answer 1

C

本句中的关键词是but for要不是，如果没有；句义：—你最后成功了吗？—是的。要不是你的帮助，就会造成巨大的损失的。根据句义可知取得成功是已经发生的事情，所以所以本句表示的是对过去情况的虚拟，故使用“情态动词+have done”；B项must have caused表示对过去情况有把握的肯定推测，不表示虚拟。故C正确。