.
1)Students of our Institute are not proud of rhir library.
2)My friend/s mother heads a big research laboratory at the plant.
3)The laboratory has coped with the developing of a new allow lately.
4)All people in my fellow student/s family work at a big chemical factory.
1) Students of our Institute are not proud of their library, are they?
2) My friend's mother heads a big research laboratory at the plant, doesn't she?
3) The laboratory has coped with the developing of a new allow lately, hasn't it?
4) All people in my fellow student's family work at a big chemical factory, don't they?
1)Students of our Institute are not proud of their library, are they?
2)My friend's mother heads a big research laboratory at the plant, doesn't she?
3)The laboratory has coped with the developing of a new allow lately, hasn't it?
4)All people in my fellow student's family work at a big chemical factor, don't they?
⇢