Both whales and leopards can move but the move in different ways., Both of them have lungs to help them breathe air., Birds have wings and feathers so they can fly in the air., Frogs have gills when they are young and their gills help them breathe underwater., Fish use their fins and tails to swim in the water., If you see a tiger in the wild, you should stay far away., Animals are amazing because they are all different in special ways., Amphibians can live both on land and in water., Amphibians have wet skin so they need to live in wet places., Lions are often fierce but they are sometimes calm and gentle when they take care of their babies., Babies mammals drink milk from their mothers., Bats are the only mammals that can fly., Cheetahs are the fastest land mammals in the world., All birds and wings and feathers; however, not all birds can fly, such as penguins and ostriches., Birds have wings and feathers not only to fly but also to keep warm.

Unit 2 - Sentences

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