Question

you pass a friend on the street in the evening and they say hola how would you respond

Answer 1

You Would say " Bien Etoo?" That means " Fine And You?

Answer 2

not "Etoo"

Answer 3

You could say "¡ Hola! ¿Cómo estás?" ("Hello, How are you?")
They probably would reply "Igualmente!! ¿Y tú?" ("Likewise!! And you?")

Answer 4

LOL im rolling right now... ETOO.... xD.