1. Are they reading books in the reading room? - общий вопрос. 2. Are they reading books in the reading room or not? - альтернативный вопрос. 3. What are they doing in the reading room? - специальный вопрос. 4. They are reading books in the reading room, aren't they? - разделительный вопрос. 5. Who is reading books in the reading room? - вопрос к подлежащему.