Ключевые слова: africa, african, amphibius, animal, aquatic, big, brown, danger, dangerous, eat, eating, fat, feed, feeding, food, green, happy, head, hippo, hippopotamus, huge, hungry, lake, large, mammal, mouth, national, natural, nature, open, park, pond, portrait, river, smile, south, swim, teeth, waiting, water, wild, wilderness, wildlife,