my first is in"snow"but not in ice ,my second is in "rose"and also in "rice",my third is not in "pen

写全了么...问题都不给全...真难为人...My first is in "snow"but not in"ice",My second is in both"rose"and "rice",My third is not in"pencil"but in"paper",MY whole is a place where there is a lot of water...