{{B}}quEstions 23 to 25 ArE BusED on thE ConvErsAtion you hAvE just hEArD、{{/B}}

A．most pEoplE Don’t think it is A sErious proBlEm.
B．most oF our pollution is CAusED By things pEoplE nEED、
C．thE govErnmEnt hAs not spEnt Enough monEy to stop it.
D．thE sEriousnEss oF pollution hAs not BEEn rEAlizED By thE govErnmEnt.