题目内容

【题目】—Were you at home at 7:00 last night? —YesI______at that time.

A. do my homework

B. did my homework

C. was doing my homework

D. am doing my homework

【答案】C

【解析】根据at that time以及at 7:00 last night,可知应该是正在做……”,据此判断是过去进行时。

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