---Do you still remember ________when the teacher came in?
---Of course, I was doing my math exercise.
A. what you were doing B. what you are doing
C. what were you doing D. what are you doing
---Do you still remember ________when the teacher came in?
---Of course, I was doing my math exercise.
A. what you were doing B. what you are doing
C. what were you doing D. what are you doing
A