Answer:
What bone has a sense of humor?
What begins with T ends with T and has T in it?
I wear a green jacket on the outside white jacket as a second layer and red jacket inside. I am pregnant with a lot of babies. (one word)
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
I am black of eye and bright of hair. I fast into the ground and follow my lord as he races around the world. What am I?
No matter how little or how much you use me, you change me every month.