"What class were you in at that time?" Or, "What class were you in in that time?"?
- JohnLv 42 months agoFavourite answer
At that time is selected,because you want to let the listener know it is in a fixed time that what class you were.In is a preposition which is used for a period of time,and usually it means a future.For example: in a week, in two hours,in a month, in the morning,in the evening.
Compare: At 2:00 pm on June 1st, 1998, at that moment, at a time,at that time.
- RPLv 72 months ago
I don't like either. What's wrong with, what class were you in?
- IOMLv 72 months ago
At that time.