Do you ....................Mondays?/ Yes
Do you ride a bike on Mondays? - Yes; I do. I ride a bike on Mondays.
Do you ....................Tuesdays?/ Yes
Do you climb the rock on Tuesdays? - Yes; I do. I climb the rock on Tuesdays.
Do you ....................Wednesdays?/ Yes
Do you swim in the sea on Wednesdays? - Yes; I do. I swim in the sea on Wednesdays.