阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。 People can often see a talking parrot on a TV show, in a movie, or even in someone's home. The parrot has learned {#blank#}1{#/blank#} (copy) sounds that people make. Dolphins, bats, and some other animals also copy sounds. Now we can add elephants {#blank#}2{#/blank#}this list of copycats (盲目模仿者).
Dr. Joyce Poole is an expert,{#blank#}3{#/blank#}studies the sounds of elephants. While she was in Kenya, she would hear strange noises {#blank#}4{#/blank#} (make) by Mlaika after sunset. Mlaika was{#blank#}5{#/blank#} 8-year-old African elephant and it lived near a highway.
Dr. Poole says that she couldn't tell the {#blank#}6{#/blank#} (different) between Mlaika's call and the {#blank#}7{#/blank#} (distance) truck noise. Why did it copy the sounds of the trucks driving by? Animals that are able to copy sounds may enjoy {#blank#}8{#/blank#}(practice) new sounds. When they {#blank#}9{#/blank#} (keep) outside of their natural environment, they may copy unusual sounds.
So far Dr. Poole {#blank#}10{#/blank#}(spend) 18 years 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.
