Answer will give best answer

7. in which sentence is the word barn used as the object of a preposition? (1 point)
the sutters' barn and fence need a new coat of paint.
the barn owl flies silently through the night.
john found the dog asleep in the barn.
close the barn door when you leave.

8. in which sentence is the word my used as an interjection? (1 point)
my letter to the editor was published today.
i expressed my ideas about the new freeway.
i could not believe my eyes.
my, there were a lot of letters on the subject!