

I saw a dog in the park.
Used to refer to a single item or one of a group.
I need a pen to write.
She has a cat at home.
Can you give me a book?
a friend
a chance
a problem
one
single
any
I saw a dog in the park.
Used to refer to a single item or one of a group.
I need a pen to write.
She has a cat at home.
Can you give me a book?
a car
a friend
a house
one
any
single