Bài tập thì quá khứ tiếp diễn 3 Kim Cat - October 18, 2022 0 1. I ... Math at that time last week. studied was studying am studying 2. ... with your friends at 2PM yesterday? Were you chatting Were you chat Did you chat 3. My father was cleaning up the house ... my mother was cooking dinner. when while before 4. Tom was seeing a doctor ... right now in the future in the past 5. The leader ... a very important meeting at this time 2 days ago. was joining is joining joined 6. ... I met him, he was going to his grandparents' house. While After When Please fill in the comment box below. Time's up