Where is the dog?
The dog is on the cat.
The teddy bear is ... the table.
under
Where is the book?
The book is under the table.
Where is the cat?
The cat is in the box.
The computer is ... the desk.
on
Where is the pencil?
The pencil is in the pencil case.
Where is the cat?
The cat is on the chair.
The ruler is ... the bag.
in