【单选题】听力原文:W: We can't find David. He is missing! The train is about to start. M: Don't worry. Maybe he is buying some food at the shop on the platform. Where does the conversation possibly take place?
【简答题】请根据抽象层次对下列概念进行排序。(由高到低)(I)教育(II)职业(III)收入(IV)社会地位(V)自致地位A. (V)>(IV)>(I、II、III) B. (IV)>(V)>(I、II、III) C. (I、II、III)>(IV)>(V) D. (I、II、III)>(V)>(IV)