Lesson 18Friendship Between Animalsfriendshiprhinoskinwarninsectrelationshipn. 友情，友谊n. 犀牛n. 皮，皮肤v. 警告，提醒n. 昆虫n. 关系，关联Words and expressionssurvivehippotortoisetrulyboundaryv. 生存，存活n. 河马n. 龟adv. 真正，正确地n. 分界线，边界Words and expressionsTo use the following words and expressions correctly:friendship, warn, relationship,touch ones heartobjectivesDo you think there is friendship between animals?What different animals have you seen living well together?How warm and gentle are these pictures!
