第15题: [单项选择]{{B}} Questions 11 to 18 are based on the passage you have just heard.{{/B}} A. The janitor is too busy to do his work. B. The sanitary conditions of an apartment. C. The relationship between the janitor and the two speakers. D. The architecture of a building. 参考答案:B 答案解析:[听力原文]
W: I’m going to ask the janitor to clean the lobby.
M: Would you ask him to wash the stairc