— We expected you yesterday.— I’m sorry I you to say that I couldn’t be here until today.

问题补充：

— 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

答案：

A. must have called

B. would be calling

C. could have been calling

(答案→)D. should have called

解析：本题考查虚拟语气。should have done表示“本应该……”，根据句意选D。