【正确答案】The second difference consists in the strategy adopted by both A and B. In dialogue 1, A asks an indirect question first and then, after getting a positive answer, goes on to ask whether B is willing to go shopping with him/her. This, according to Brown and Levinson's face-saving theory, is a face-saving act. Sure, this is considered to be polite to B. So in return, B cooperates well in the conversation and accepts the invitation, which is also meant to be face-saving in nature and hence polite to A. In dialogue 2, however, A directly asks whether B is willing to go with him/her, and does not even make clear what it is for, which constitutes a face-threatening act and hence a little impolite to B. Therefore, in response, B, instead of answering yes or no, asks A a question. After getting to know the answer, B chooses to refuse the invitation. In other words, in dialogue 1, A applies the face- saving theory and PP in the communication successfully while in dialogue 2, A fails to apply these two very important theory and principle governing conversation. This leads to the different results in real communication.

【答案解析】[解析] 本题主要考查学生对会话原则、话语分析等语言学知识的掌握以及运用这些理论和原则进行分析问题的能力。考生可以从面子理论、礼貌原则和话轮等角度加以解答。