Ex. 1-A, An

A, An

A and an are indefinite articles. In English, the indefinite article is used after the verb be when followed by a singular noun or by an adjective + a singular noun.
Examples:
John is a lawyer.
Mary is a friendly girl.
I am an accountant.
It is an excellent book.
A is used before words starting with a consonant sound (a doctor, a good student). An is used before words starting with a vowel sound (an officer, an excellent teacher). A and an are never used before plural nouns.

Instructions. Fill the blanks with a or an, when necessary.

Mr. Anderson is ________ good actor.
1. a
2. an
3. X
My sister is ________ physics teacher.
1. a
2. an
3. X
The Da Vinci Code is ________ interesting book.
1. a
2. an
3. X
Tony and Laura are ________ cousins.
1. a
2. an
3. X
He is ________ unusual person.
1. a
2. an
3. X
Mr. Jones is ________ honest man.
1. a
2. an
3. X
Tim Duncan is ________ excellent basketball player.
1. a
2. an
3. X
Jacqueline is ________ very pretty girl.
1. a
2. an
3. X
They are ________ professors at UNAM.
1. a
2. an
3. X
Michael and Devin are ________ intelligent boys.
1. a
2. an
3. X
Are you ________ disorganized person?
1. a
2. an
3. X
Peter is ________ hard worker.
1. a
2. an
3. X
It is ________ unique story.
1. a
2. an
3. X
Paris is ________ romantic city.
1. a
2. an
3. X
Spanish is ________ beautiful language.
1. a
2. an
3. X