School things:
a pen
a pencil
an easer
a bag
a copybook
a diary
My room:
a bed
a chair
a window
a table
a lamp
a floor
Body:
a hand
a hair
a head
an arm
a face
a leg
a foot
Jobs:
a doctor
a engineer
a waitress
a pilot
a police
a teacher
Animals:
a cat
a dog
a giraffe
a lion
a wolf
a mouse
an elephant