单选题 The atmosphere in the police chief's office was electric with contention.
【正确答案】 A
【答案解析】画线词contention的意思是：争论，争端。与discord意思相近。但discord更强调不和。辨义：A．discord争论、不和；B．rejoicing喜悦；C．weeping哭泣；D．curiosity好奇心。