The　reduction　of　graphene　oxide　has　been　widely　used　to　control　the　properties　of　graphene-based　materials.　Traditional　methods　thoroughly　remove　oxygenated　functional　groups　in　graphene　oxides.　We　show　that　ethanol,　ethylene　glycol　and　glycerol　can　selectively　reduce　epoxy　groups　in　graphene　oxide　while　hydroxyl　and　carboxyl　groups　remain　unchanged.　Hydrazine　hydrate　can　reduce　oxygen　functional　groups　except　carboxyl　groups.　These　selective　removals　can　be　used　to　control　the　reduction　degree　of　graphene　oxides　and　their　properties.　The　electrical　conductivity　of　the　reduced　graphene　oxides　with　different　types　of　oxygen　functional　groups　varied　significantly　and　increased　with　the　degree　of　reduction.