4、cameunwell,IfeltasenseofdutythatperhapsI______before.A.mightnotfeelB.shouldnothavefeltC.couldnotfeelD.wouldnothavefelt27.---Doestheriverstillfloodthevillageduringthesummer?---Thanks to the pasttwoyears’riverengineeringefforts,theimpact____.A.wasreducedB.hasredu