8.disappear vi.消失→appear vi.出现 9.destruction n.毁坏→destroy vt.毁坏;摧毁→destructive adj.破坏性的 10.sharp adj.锋利的;尖的→sharpen vt.使变得锋利 11.fortune n.运气;命运;财富→fortunate adj.幸运的→fortunately adv.幸运地 12.indicate vt.象征;暗示→indication n.指示;象征 13.identity n.身份;特性→identify vt.确定;辨别→identification n.辨认;鉴定 14.mysterious adj.神秘的→mystery n.神秘的人(或事物);奥秘 15.hairy adj.毛的;多毛的→hair n.头发,毛发