1. Complete the sentences with a or an if necessary. a) This is Dan and this is Nicola. They are ... teachers. And this is Bob. He is not... teacher. He is ...architect. b) My father and mother are ... doctors and they work in .. .hospital. My father is ... cardiologist and my mother is ... anesthetists. I don't want to be ... doctor, i want to be... actor. And my two sisters don't want to be ... doctors. They want to be ... artists.

They are teachers. And this is Bob. He is not A teacher. He is AN architect. My mother and father are doctors and they work in A hospital. My father is A cardiologist and my mother is AN anesthetists. I don't want to be A doctor, i want to be AN actor. And my two sisters dont want to be doctors. They want to be artists