第34题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. It’s a problem not yet solved. B. It’s a question difficult to answer. C. It’s a matter that is hidden or secret. D. It’s a legend handed down from the past. 参考答案:A 答案解析:[听力原文]26-28 (26) How men first learnt to invent words is unknown. All we really know is that