单选题 The machinery had been wrecked so efficiently that police were sure it was a case of ( )
【正确答案】 B
【答案解析】考查名词辨析。句意：这个机械装置完全被破坏了，警察认定这是一起蓄意破坏事件。vagabond“流浪者，游手好闲者”，sabotage “阴谋破坏；怠工”，paradox “悖论，自相矛盾的人或物”，tachyon“超光速粒子”。根据语境可知，B项符合题意。