Задать общий, альтернативный специальный и разделительный вопросы к предложением Alecs parents have come back from Moscow и Liza is playing with her dog

Have Alec's parents come back from Moskow? Have Alec's parents come back from Moscow or Spain? Who have come back from Moscow? Alec's parents have come back from Moscow, haven't they? Is Lisa playing with her dog? Is Lisa playing with her dog or cat? Who is playing with dog? Lisa is playing with her dog, isn't she?