补全对话 a:can i help you?b:yes___.today is mother's day.i'm looking for a present _____my mother.
a:maybe you can buy her some fiowers.b:great!but_____flowers shall i buy,roses or carnations?a:i think carnations are________.they mean happiness,sweetness and love.they are_______mothers.b:how_______are they?a:thirty yuan a bunch.b:ok.i'll_______it.here's the money.a:thank you and best___________to your mother.goodbye!b:bye!