single brick single bridge single broadcast single broken single brood single brush single building single bulb single bullet single burst single bus single business single button single buyer single by choice single byte single cab single cabin single cabinet single cable single calendar single calf single call single came single camera single can single canadian single candidate single candle single capsule single car single car accident single carbon single card single carriageway single carrier single case single cases single cask single casualty single catch single category single cause single cavity single cell single cell suspension single cell suspensions single celled single cells single cent single center single central single centralized single centre single certifications single chain single chain antibodies single chain antibody single chain fv single chair single chamber single chance single change single channel single chapter single character single characteristic single charge single chart single charts single chemical single child single chip single choice single christian single christians single chromosome single cigarette single circuit single circular single city single claim single class single click single client single clone single cloud single club single clue single cluster single clutch single coat single coating single code single coherent single coil single coin single collection single colonies