составить пять видов вопросов Общий,альтернативный, разделительный, подлежащий, специальный
He had to go to work at a blacking fastory. ​

He had to go to work at a blacking factory. ​

общий: Did he have to go to work at a blacking factory?

альтернативный: Did he have to go to work at a blacking or chocolate factory?​

разделительный: He had to go to work at a blacking factory, didn't he?

к подлежащему: Who had to go to work at a blacking factory?

специальный: Where did he have to go to work?