The indefinite article a/an

There is ____ green English book on the desk.

• an

• a

She's reading ___ old comic.

• an

• a

They've got ____ idea.

• an

• a

He is drinking ___ cup of coffee.

• an

• a

The girl is ____ pilot.

• a

• an

Leipzig has _____ airport.

• an

• a

This is ____ expensive bike.

• a

• an

Look! There's ____ bird flying.

• a

• an

My father is ____ honest person.

• an

• a

My friend likes to be ____ astronaut.

• a

• an