The plant is ___ the table.
on
He's swimming ___ the river.
in
It's better to get a taxi if you are out alone ___ night.
at
People usually give presents ___ Christmas Day.
on
The lesson is ___ 9am ___ Monday mornings.
at/on
The weather is often terrible ___ London ___ January.
in/in
I never work ___ the weekend.
at
I live ___ a small flat ___ the city center.
in/in
She got married ___ September.
in
Where's July? She's ___ school.
at
Lucy is arriving ___ February the 13th ___ 8 o'clock ___ the morning.
on/at/in
I usually go to my parents' house ___ Christmas. We eat turkey together ___ Christmas Day.
at/on