Answer:
I am the first you ever saw, what greets you every morning and what goes out in the end.
Used to keep prisoners silent and to make temporary repairs on cars.
What ship has no captain but two mates?
Old people and owls are said to be this.
Before Mount Everest was discovered, what was the highest mountain on Earth?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.