What have the children from paul`s class done and haven`t they done? fill in the gaps with the correct verb forms. jay and jane have already practised their dance.(alreaby/perform) polly her ballet dance .(just/perform) ron his costume.(yet/ prepare) they flowers? (yet/buy) they people to the concert? (yet/invite) andy the poster.(just/finish) jack a hat for his tricks. (already/ bring) they what they will do next year. (yet/decide)