The workers (build) a new block of flat in our region

нужно отрицательная форма и 4 вопроса

The workers have built a new block of flat in our region.

The workers haven't built a new block of flat in our region.

Have the workers built a new block of flat in our region? - общий

Have the workers built a new block of flat or houses in our region? - альтернативный

What have the workers built in our region? - специальный

The workers have built a new block of flat in our region, haven't they? - разделительный