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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:684

—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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—Whatwhentheearthquakehappened