Ask and answer questions about what you were doing last Saturday

Ask and answer questions about what you were doing last Saturday at the times below.
A: What were you doing at 7 oclock on Saturday evening?
В: I was... .
A: What were you doing at... ?

Game
Choose a leader. The leader says where he/she was last Sunday. In teams, the class try to guess what he/she was doing there.
Leader: Last Sunday I was at the park.
Team A S1: Were you having a picnic?
Leader: No, I wasnt, etc