题目内容
【题目】What ______ at seven yesterday morning?
A. is she doing B. was she doing
C. did she do D. does she do
【答案】B
【解析】
试题分析：句意：昨天早晨七点，她正在做什么？结合语境可知本句描述的是过去某时正在进行的动作，故用过去进行时态，选B。
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题目内容
【题目】What ______ at seven yesterday morning?
A. is she doing B. was she doing
C. did she do D. does she do
【答案】B
【解析】
试题分析：句意：昨天早晨七点，她正在做什么？结合语境可知本句描述的是过去某时正在进行的动作，故用过去进行时态，选B。