(A)accumulation 積累/積聚/積攢(B)invasion 入侵/侵略/侵犯/侵擾(C)investigation 調查/偵查(D)communication交流/溝通/交際/傳達/傳播/通訊/訊息/消息/信件 Unfortunately 不幸地/倒楣地evidence 證據/證明serial 連環/連續/分期
27 Unfortunately, the police were unable..-阿摩線上測驗