新增听力最后一个部分有二十篇左右真题。重听题没有音频，但是在题干了写了重听的原文。P11. What are the speakers mainly discussingA. Animal behavior that cannot be explained by natural selectionB. The evolution of various forms of deceptive animal communicationC. Possible reasons that animals communicate truthful messages D. Research that shows similarities between human and animal signals2. What point does the professor make about human communicationA. It is often influenced by social rules.B. It almost always
