“Mlaika was not the only copycat elephant,” Dr. Poole says. Calimero is a 23-year-old male African elephant. He spent 18 years with two female Asian elephants. Asian elephants make chirping sounds (sounds made by birds) to talk with one another. African elephants usually do not make chirping sounds. But Calimero now does. He is copying his Asian elephant friends. Dr. Poole says that elephants need to form bonds with their family and friends. She says, “They make sounds to communicate with each other. When they are separated, they use sounds to keep in contact.”

　　Parrots, dolphins, humans, and elephants show that being a copycat is one way that animals and people make new friends and keep old ones.

　　56. According to the passage, what does Mlaika copy?

　　A. The sound of people. B. The sound of trucks. C. The sound of Calimero. D. The sound of birds.

　　57. Why is Calimero mentioned in the passage?

　　A. To clarify the meaning of copycat elephants.

　　B. To show the cleverness of African elephants.

　　C. To add another example of copycat elephants.

　　D. To introduce a special life skill of Asian elephants.

　　58. From paragraph 4, we can know ________.

　　A. how long it takes for an elephant to learn a new sound

　　B. why the African elephant can make chirping sounds

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