---I called you yesterday evening, but there was no answer.
----- Oh, I’m sorry. I dinner at a restaurant at that time.
A. have
B. had
C. was having
D. have had
网友回答
A. have
B. had
(答案→)C. was having
D. have had
解析：考查时态。句意：昨天晚上我给你打电话，但是没人接。噢，很抱歉，我当时正在饭馆吃饭。根据题中的时间状语at that time 时过去进行时的语法标志之一，所以选C。