单项选择题
A.flora: plants B.vegetation: aboriginals C.fowl: amphibians D.livestock: oxen E.department: professors
A.infantile... cogent B.florid... objective C.steeped ... justificatory D.spare ... intrinsic E. judicious... realistic
A.doubted... insufferable B.posited... unknown C.argued... relative D.assumed... exoteric E. conveyed ... insuperable