Answer:
I pass before the sun but make no shadow. What am I?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
If I drink, I die. If I eat, I am fine. What am I?
I'm many people's favorite place, even though many don't remember their stay. You'll love to come but hate to leave. If you get cold, use my sleeve. What am I?
I jump when I walk and sit when I stand.
No matter how little or how much you use me, you change me every month.