По какому принципу делать заданиие: Употребите верно личные…

По какому принципу делать заданиие: Употребите верно личные местоимения в косвенном падеже (me/us/him/her/ them/it). I don't know Sarah's parents. Do youknow …? Where is Ann? I want to talk to … . I want that book. Please, give it to … . We're going to the conference. Are you going with …? Steve is gloomy today. What is the matter with …?