a cat - a game of golf - a human emotion - a Peruvian -
a very nice lady
an apple - an easy job - an interesting film - an old man
- an umbrella
exceptions :
a European country - a one-day conference - a university
an honest man - an hour - an FBI agent
A or AN ?
A/an n'a pas de pluriel
an animal (un animal) - animals (des animaux)