in, on, at
We swam ____ the pool.
We swam in the pool.
I live ____ Arizona.
I live in Arizona.
We have class ____ Monday.
We have class on Monday.
My birthday is _____ June.
My birthday is in June.
I sleep late ____ Saturday.
I sleep late on Saturday.
There was a wreck ____ the highway.
There was a wreck on the highway.
He was born ____ summer.
He was born in summer.
It's so early _____ the morning.
It's so early in the morning.
I went to sleep ____ midnight.
I went to sleep at midnight.
The test is _____ December 5th.
The test is on December 5th.
I left it ____ the kitchen.
I left it in the kitchen.
She goes to work ____ the bus.
She goes to work on the bus.
He goes to school ____ his bike.
He goes to school on his bike.
That movie was made _____ 1989.
That movie was made in 1989.
I start my new job _____ August 8th.
I start my new job on August 8th.
He goes to work ____ 5:00 in the morning.
He goes to work at 5:00 in the morning.
Is she ____ work?
Is she at work?
We had a fun day ____ the beach.
We had a fun day at the beach.
Bats come out ____ night.
Bats come out at night.
There are fish ____ the river.
There are fish in the river.
We woke up ____ dawn.
We woke up at dawn.
His painting showed the sky ____ twilight.
His painting showed the sky at twilight.
She's going to live with her parents while she's ____ school.
She's going to live with her parents while she's in school.
I'll clean up while the kids are ____ school.
I'll clean up while the kids are at school.
I'm ____ home.
I'm at home.
OR
I'm home.