_________ a ruler.
_________ a computer.
_________ an eraser.
_________ a pencil.
_________ files.
_________ students.
_________ a sharpener.
_________ a school bag.
_________ a table.
_________ books.
_________ pencils.
_________ a glue stick.
_________ a book.
_________ chairs.
_________ notebooks.
_________ scissors.
_________ a pen.
_________ a pencil case.
_________ color pencils.
_________ a teacher.