Find the wrong usage:
an unicorn
an ice-cream
an engine
an axe
________ pencil, ________ pen and ________ inkpot .
a, a, an
an, a, a
a, an, a
a, a, a
_________ one-day programme.
an
the
a
none of these
________ gun.
of
off
He is ________ boy.
two
I am _______ engineer.
fine
old
_________ cup.
on
It is _________ flower.
am
_______ apple.
at
_________ sky is blue.
