Do you have an eraser?
Yes, I do. / No, I don't.
Do you have a book?
Yes, I do. / No, I don't.
Do you study English every day?
Yes, I do. / No, I don't.
Are you from Australia?
Yes, I am. / No, I am not.
What's your name?
It's... / My name is...
What's your phone number?
It's...
Do you surf the net every day?
Yes, I do. / No, I don't.
Are you Spanish?
Yes, I am. / No, I am not.