39. Which of the following is NOT mentioned as an unanswered question in the passage?
(A) What allowed language to evolve uniquely in humans vs other primates?
(B) How did the complexity of language change over human evolution?
(C) What cognitive processes are involved in language use?
(D) What is the genetic basis and evidence for the evolution of language?
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統計: 尚無統計資料
統計: 尚無統計資料