Complete the sentences with indefinite article a/an when necessary.
a- There's _____ blue car in front of your house.
b- He's watching _____ old TV show.
c- She had _____ idea.
d- That one is _____ honest guy.
e- That man is ______ engineer.
f- That woman is ______ doctor.
g- They are _____ doctors.
h- We have _____ subjects to talk about.
i- Rio has _____ international airport.
j- That's _____ one way street.