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

问题补充：

—We expected you yesterday.

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

A. should have called

B. must have called

C. could call

D. would call

答案：

(答案→)A. should have called

B. must have called

C. could call

D. would call

解析：

句意为：——我们昨天在等你。——对不起，我应该打电话告诉你我今天才能到。should have done表示过去应该做的事却没做。