Question

We eat breakfast (in, on, at) (mondays, noon, the morning, sundays).
We don't go ti school (in, on, at) (mondays,noon,the morning, sundays).
We eat lunch (in ,on, at) (mondays, noon, the morning, sundays).

Answer 1

We eat breakfast in the morning.
We don't go to school on sundays.
We eat lunch at noon.

Answer 2

We eat breakfast in the morning.
We don't go to school on sundays.
We eat lunch at noon.