The squirrel is running INTO / ROUND / OFF the tree.
OFF
He's going INTO / ACROSS / OUT OF the house.
OUT OF
He's walking ROUND / DOWN / OUT OF the stairs.
DOWN
We are walking UP / INTO / ACROSS the lake.
ACROSS
We're walking ONTO / THROUGH / OVER the forest.
THROUGH
The woman's going DOWN / UP / THROUGH the stairs.
UP
We're walking ROUND / ONTO /OVER the lake.
ROUND
They're going OFF / INTO / THROUGH the house.
INTO
She's climbing INTO / ONTO / OFF the tree.
ONTO
The bird is flying ONTO / UP / OVER the tree.
OVER