you were ing today, I’d have met you at the railway station.
A. Have I known
B. Had I known
C. I have known
D. I had known
网友回答
A. Have I known
(答案→)B. Had I known
C. I have known
D. I had known
解析：考虚拟条件句的省略倒装句：句意：如果我知道你今天要来这儿，我就会到火车站去接你了。这是一个虚拟条件句，正常的表达是：if I had known you were ing today, I’d have met you at the railway station.在虚拟语气里面，如果有if就用正常的语序，省略if是要把had，were，should提前，选B。