Answer:
As I went over London Bridge I met my sister Jenny; I broke her neck and drank her blood and left her standing empty.
The more of me you take, the more I appear behind you. What am I?
What is the word that even in plain sight remains hidden?
I have cities but no houses I have mountains but no trees I have water but no fish. What am I?
I begin your sentences. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.