8.-What were you doing when the accident happened? -I had just had a lunch break and to mark my students’ papers. A.had started B.started C.have started D.was starting 查看更多

 

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—What were you doing when the accident happened?( )

—I had just had a lunch break and ________ to mark my students’ papers.

A. had started   B. started  C. have started  D. was starting

 

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