The ruler is______the school bag.
The ruler is IN the school-bag.
The green book is______ the yellow bag.
The green book is IN the yellow bag.
The pencil is_____ the book.
The pencil is ON the book.
The pen is ______the book.
The pen is ON the book.
The computer is______the desk.
The computer is ON the desk.
The school-bag is_____the chair.
The school-bag is UNDER the chair.