He's (on the / in the / X) .....
He's upstairs.
I'm (on the / in the / X) .....
I'm downstairs.
She's (on the / in the) .....
She's on the balcony.
It's (on the / in the) .....
It's in the yard.
She's (on the / in the) .....
She's in the basement.
He's (on the / in the / X) .....
He's in the bedroom.
She's (on the / in the) ....
She's in the kitchen.
They're (on the / in the) ....
They're in the living room.
