a / an
an orange
What is it?
a train
What is it?
a van
What is it?
a car
a / an
an egg
What is it?
a bike
a / an
an apple
What is it?
a car
What is it?
an umbrella
a / an
an umbrella
What is it?
a car
What is it?
a van
What is it?
a taxi