1. He didn't open the window before classes.
Did he open the window before classes?
2.Ann didn't translate a lot of foreign letters at the office last week.
Did Ann translate a lot of foreign letters at the office last week?
3. I didn't finish work at five o'clock the day before yesterday.
Did I finish work at five o'clock the day before yesterday?
4. He didn't live in Kiev five years ago.
Did he live in Kiev five years ago?
5. They didn't return home in the evening.
Did they return home in the evening?
6. They didn't discuss a lot of articles from these French magazines last week-end.
Did they discuss a lot of articles from these French magazines last week-end?