单选题 Where does the conversation mostly take place?
【正确答案】 C
【答案解析】[听力原文]12-14
M: I'd like to buy some stamps for this letter.
W: Let me just weigh it first.
M: How much will it be?
W: Are you sending it by regular or by speed?
M: Just the regular.
W: That'll be four dollars.
M: How fast can my mail be received?
W: In just two days, can I say it by speed.

[解析] 推理判断题。由关键词“stamp,mail”可判断出是在邮局。
【正确答案】 B
【答案解析】[解析] 事实细节题。由that'll be four dollars可知邮平信是4美元。
【正确答案】 B
【答案解析】[解析] 事实细节题。由just two days可知需要2天信才会到达目的地。