Correct: The cheetah is the fastest animal. , The river Nile is the longest river. , Mount Everest is the highest mountain., The giraffe is the tallest animal. , The hummingbird is the smallest bird., Incorrect: The tiger is the faster animal., The river Thames is the more longer river, K2 is the higher than the mountain., The ostrich is the more tall animal., The chicken is smallest bird.,

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