1. mine
It's mine.
A pet theory of mine is that things should be seen from a distance.
I buy my silver from a man who has a mine on his property.
I looked around and noticed that mine was the only car on the road.
Lips that touch liquor shall not touch mine.
Many workers were trapped in the coal mine.
His birthday just happens to be the same as mine.
Mine owners refused to negotiate.
Some of these young people have legs twice as long as mine.
He drove over a land mine and his jeep blew up.
an excavation in the earth for extracting coal or other minerals
If your answer is correct, it follows that mine is wrong.
Let's meet halfway between your house and mine.
His scores are always better than mine, even though he doesn't study very much.
The patient's lung tissue was damaged from years of working in a coal mine.