◎ 题干
—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
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“—I phoned you at 7:00 this morning. But there was no answer. —Well, maybe I ____________morning exercises at that time. [ ]A. was doingB. did C. is doing D…”主要考查了你对  【过去进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。