Сделать вопросные предложения все возможные my friend has already been to the nature museum

1.My friend has already been to the Nature Museum, has not he ? 2.Has your friend already been to the Nature Museum? 3.Has your friend already been to the Nature Museum or to the Art Museum 4.Whose friend has already been to the Nature Museum ? 5.Where has your friend already been ? 6.What museum has your friend already been to ?