12.A.devotion B.effort C.sacrifice D.contribution13.A.Therefore B.But C.Though D.Otherwise14.A.normal B.useful C.difficult D.successful15.A.changed B.worked C.gave D.did16.A.discussed B.hidden C.spread D.kept17.A.carefully B.sadly C.excitedly D.tenderly18.A.see B.find C.show D...