---I called you yesterday evening but there was no answer.---Oh I am sorry I dinner at m

问题补充：

---I called you yesterday evening, but there was no answer.

---Oh, I am sorry I dinner at my friend’s house.

A. have

B. had

C. was having

D. have had

答案：

A. have

B. had

(答案→)C. was having

D. have had

解析：根据文章内容I called you yesterday evening, but there was no answer.可知答案为C，用于过去进行时，故选C