—What when the earthquake happened on May 12th ?—Er, I was having a geography class in th

发布时间：2020-08-17 00:58:05

—What      when the earthquake happened on May 12th ?
—Er, I was having a geography class in the classroom.
A. are you doing        B. did you do   C. were you doing  D will you do

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解析：考查时态。过去进行时表示在过去的某个时间点或者时间段正在发生的事情。句意：当5.12地震发生的时候，你在做什么？—嗯，我在真正教室里上地理课。故C正确。
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