1,把下列列名词变为复数形式
leaf_____ puppy______ box______ knife_____
fly_____ fox_______ bus_______ bench________
brush______ _kiss________ church________
dish______rule_______peach_______glass_______
pencil______boy______zoo-_______man-______
roof________ sheep______ _knife_____ lady_______
key_______chimney_______story_______watch______
bamboo_______city______family________day______
speech_____thief______mouse_______fish______
goose______people______
ox_____Chinese________deer________foot______
child______tooth_______
hero_____Negro_______ sheep________boss_____