They ___ blocks.
are
is
It's __ car.
an
a
It's __ doll.
a
an
It's __ train.
a
an
It's __ aeroplane.
a
an
It's __ ball.
an
a
It's __ boat.
a
an
It's __ octopus.
an
a
It's __ bus.
an
a
It's __ teddy bear.
an
a