问题补充:
---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
答案:
A. have
B. had
(答案→)C. was having
D. have had
解析:句意:我昨晚给你打电话,但是没人接。对不起,我当时在参观吃饭。用过去进行时,表示过去某个时间正在进行的动词,结构为was/ were+doing;故选C。