This　paper　proposed　an　interactive　query　mode　for　an　OWL-oriented　question-answering　system,　named　Agile,　to　refine　answers.　The　key　problem　for　interactive　query　modes　in　QAs　is　producing　natural　language　sub-questions.　This　paper　used　a　two-phases　semantic　mapping　method　to　produce　sub-questions.　The　first　phase　builds　RDF　triples　based　on　existing　OWL　knowledge　and　given　original　questions.　The　second　phase　maps　RDF　triples　into　natural　language　sub-questions　through　some　lingual　common　sense　and　predefined　rules.　To　validate　effect　of　interactive　queries,　we　have　conducted　some　experiments　involving　two　different　domain　of　knowledge　bases　and　accepted　some　promising　results.　©　2013　IEEE.