The official was arrested for inability to ______ all his fortune he has enjoyed.
 
【正确答案】 D
【答案解析】 句意:那位官员因不能证明他所有财产的合法来源而被捕。justify证明……是正当的。clarify阐明(立场);澄清(真相)。intensify加强。verify证实,查证。