Floor
Verb + floor
mop the floor
sweep the floor
scrub the floor
cover the floor (with carpets)
Common expressions
lie on the floor
sleep on the floor
slip on the (wet) floor
pile (books) on the floor
spill (coffee) on the floor
Exercises
Verb + room
She picked up a brush and sweep the floor.
Keep out of the kitchen for fifteen minutes. I've just finished mopping the floor.
We covered the floor with newspapers before we started painting the ceiling.
I got down on my hands and knees and scrub the floor clean.
Common expressions
The bank robbers ordered everybody to lie on the floor.
Do you have a cloth? I've just spilled some tea on the floor.
We took the books down from the shelf and piled them on the floor.
There weren't enough beds, so some people had to sleep on the floor.
Be careful you don't slip on the wet floor. I've just mopped it.
Notes
In the UK, we talk about the ground of a building:
The canteen is on the ground floor of the building.
I hope you like climbing stairs. My office is on the top floor.
If you drop something, it falls on the floor:
Excuse me, your wallet has fallen on the floor.
If you drop something outside, it falls on the ground.