Simon is swimming （along） the pool.
Sandy is going （to） the library.
Mille is walking （across） the road.
They plan to climb （up） to the top of the hill.
Hobo is walking （round） the table.
Who can jump （over） this short wall.
Daniel is walking （down） the stairs（楼梯）.
Amy is walking （from） the sofa to the window.
He sits （behind） me.He can't see nothing.
Look!The boy is standing （outside） the classroom.
There are two boats （under） the bridge.