Bill bought a car last month составить вопросительные предложения (общий вопрос, два специальных,артельнативное и вопрос к подлежащему)

Bill bought a car last month, didn't he? - разделительный
Did Bill buy a car last month? - общий
Did Bill buy a car or bike last month? - альтернативный
When did Bill buy a car? - специальный
What did Bill buy last month? - специальный
Who bought a car last month? - к подлежащему

Did bill buy a car
What did bill buy
Why did bill buy a car
Did bill buy a car or a motorbike
Bill bought a car,didn't he