Bill bought a car last month составить вопросительные предложения

(общий вопрос, два специальных,артельнативное и вопрос к подлежащему)

Did bill buy a carWhat did bill buyWhy did bill buy a carDid bill buy a car or a motorbikeBill bought a car,didn't he

Bill bought a car last month, didn't he? - разделительныйDid Bill buy a car last month? - общийDid Bill buy a car or bike last month? - альтернативныйWhen did Bill buy a car? - специальныйWhat did Bill buy last month? - специальныйWho bought a car last month? - к подлежащему