We are ........ lunch. in / at / on
at
We can rest .......... noon. in / at / on
at
I am ...... bed. in / at / on
in
We found your hamster .......... Thursday. in / at / on
on
My birthday is .......... March. in / at / on
in
I get up early ....... the morning. in / at / on
in
The hat is ........ top of his head. in / at / on
on
We stay up late ........... night. in / at / on
at
My brother and I are ........ home. in / at / on
at
I studied Korean ....... 2019. in / at / on
in
I was born ........ the 15th of June. in / at / on
on
You can post the letter ........ a weekday. in / at / on
on