阿摩線上測驗
41 What is this passage mainly about?
(A)Pygmy chimpanzees
(B)American Sign Language
(C)Comparison between Washoe and Koko
(D)Attempts to communicate with apes
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統計： A(85), B(66), C(55), D(361), E(0) #653365
統計： A(85), B(66), C(55), D(361), E(0) #653365
