请告诉我这个问题的答案?谢谢!Hello! I'm a word. i have three letters. my f

请告诉我这个问题的答案?谢谢!
Hello! I'm a word. i have three letters. my first letter is in "soon'' but not in "room", my second is in "rose" nd also in "rise",my third is not in
"pencil" but in "paper", my whole is a place where there is a lot of water.
I am the twin sister of the word "see". who am I?