    “Sentence. 1: What ‘do\ closed rivers: serve” as  after, they.‘tlose? 7    Sentence 2. Currently: Rhine water runs into  the “sea, .or ‘into’.former. “marine. ‘bays: nour  séparated from the. sea, in five’ places,. namely.  “af the mauths-of the: Nieuwe. MerwWede,.Nievie  We ‘ : ;  (Nieuwe Maas), Doratse. Kil, Spui and 1Jssel.         