A. would have telephoned B. would telephone C. must have telephoned D. had telephoned 麻烦问下 为什么不选B,不是条件句 是过去时 主句用would+动词原型吗
had+过去分词 才是 would + have +过去分词吧
追答刷新再看我的解释
后面的 otherwise"否则“ 相当于一个虚拟条件句。 等于: If I 【had known】 his telephone number.
谢谢
追答不客气