介绍:
Long ago，in the quiet night，you could hear the sound of the gray wolf.Today the wolf's sound is seldom heard.Humans changed the land and the wolves went away.Ranchers shot and trapped wolves to stop them from killing their cows and sheep.Only some wolves remain.Gray wolves aren't just gray.Their thick,warm fur can be tan or all black,and their jaws are very strong.A wolf's bite is five times stronger than a human and two times stronger than a large dog's. Wow!
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