题目内容
Mile’s experiment to teach Chantek to share things proves to be __________
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Behaviorists say that animals cooperate with human beings for their own benefit.
Laule believed that Orky, a killer whale, was the most intelligent animal she had ever seen. ____
Some animals’ intelligence can be seen in their attempts to deceive.
Orky allowed somebody to stand on his head to reach up and release the baby because he had been trained to do so. ____
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