—I phoned you at 7:00 this morning. But there was no answer.
—Well, maybe I morning exercises at that time.
A. was doing
B. did
C. is doing
D. would do
网友回答
(答案→)A. was doing
B. did
C. is doing
D. would do
解析：句意：今天早上7点钟我给你打电话。但是没人接。恩，可能那个时候我正在做早锻炼。at that time在那个时候，表示过去的某个点时间，所以句子要用过去进行时的形式，故选A