--- We expected you yesterday．
--- I'm sorry, I you to say that I couldn't be here until today．
A. must have called
B. would be calling
C. could have been calling
D. should have called
网友回答
A. must have called
B. would be calling
C. could have been calling
D. should have called
解析：考查情态动词的用法。此处should+have done表示：应该做的事没做。