quEstions 18 to 20 ArE BAsED on thE Following pAssAgE.At thE EnD oF thE pAssAgE, you will BE givEn 15 sEConDs to AnswEr thE quEstions. now, listEn to thE pAssAgE.

whAt is thE ExpECtED rEACtion oF thE loCAl pEoplE to thE stuDEnts’ EFFortsA．thEy woulD BE inDiFFErEnt AnD kEEp on throwing gArBAgE into thE rivEr.
B．thEy woulD join thE stuDEnts in ChAnging thE situAtion.
C．thEy woulD BEComE morE AwArE oF thE pollution proBlEm.
D．thEy woulD think twiCE BEForE thEy wEnt swimming or Fishing in thE rivEr.