People can often see a talking parrot on a TV show，in a movie，or even in someone's home．The parrot has learned （71）___ （copy） sounds that people make．Dolphins，bats，and some apes also copy sounds．Now we can add elephants（72）___ this list of copycats（盲目的模仿者）．
Dr．Joyce Poole is a zoologist，（73）___ studies the sounds of elephants．While she was in Kenya，she would hear strange noises （74）___ （make） by Mlaika after sunset．Mlaika was （75）___ 8-year-old African elephant （76）___ it lived near a highway．
Dr．Poole says that she couldn't tell the difference between Mlaika's call and the （77）___ （distance） truck noise．Why did it copy the sounds of the trucks driving by？Animals that are able to copy sounds may enjoy （78）___（practice） new sounds．When they are kept outside of their（79）___（nature） environment，they may copy unusual sounds．
So far Dr．Poole （80）___ （spend） 18years with two female Asian elephants．Asian elephants make sounds like birds to talk with one another．
Parrots，dolphins，humans，and elephants show that being a copycat is one way that animals and people make new friends and keep old ones．
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