An is . . . . . . . . indefinite article.

Do you drive on . . . . . . . . right or on . . . . . . . . left in the USA?

. . . . . . . . brave always rule over the earth.

I have found . . . . . . . . image of my childhood days.

. . . . . . . . Queen of England lives in . . . . . . . . Buckingham Palace in London.

My . . . . . . . . friend likes to listen to . . . . . . . . good story.

. . . . . . . . condition of the boy is serious.

Delhi is one of . . . . . . . . largest Asian countries.

. . . . . . . . almighty will help us in our work.