名词单数变复数.这些题目的答案‘toy-ship-boy-penil-bus-book-sheep-leaf-knife-man-figh-ment-ferry-wish-radio-hippo-potato-nome-milk-tooth-water-china-map-deer-

　　名词单数变复数.这些题目的答案‘toy-ship-boy-penil-bus-book-sheep-leaf-knife-man-figh-

　　ment-ferry-wish-radio-hippo-potato-nome-milk-tooth-water-china-map-deer-