Answer:
I begin your sentences. What am I?
As a state in the USA, I am round on both sides and high in the middle. What am I?
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
Light hides me and darkness kills me. What am I?
My voice is tender my waist is slender and I'm often invited to play. Yet wherever I go I must take my bow or else I have nothing to say.
I flow from the Homerβs mouth when he sees doughnuts.