Starting Line StudentsBook 11,Unit 3 Animal world,Lesson 16,crocodile,ostrich,penguin,whale,shark,hippo,zebra,lion,butterfly,giraffe,hummingbird,reptile 爬行动物 mammal 哺乳动物insect昆虫 crocodile鳄鱼 ostrich 鸵鸟 penguin 企鹅whale 鲸 shark鲨 hippo河马 zebra斑马 lion狮子 butterfly蝴蝶 hummingbird蜂鸟 giraffe长颈鹿 wing翅膀,Words,Mammals Mammals bodies are covered with hair or fur. Mother mammals feed milk to their babies. Mammals have warm blood,Birds All birds have feathers. All birds have two wings. Mother birds lay eggs,Rep
