单选题

单选题 Who most likely is the speaker?
【正确答案】 C
【答案解析】[听力原文] 86-88
Questions 86~88 refer to the following telephone message.
牙科营业时间外的电话留言
单选题 What has changed at the clinic?
【正确答案】 B
【答案解析】
单选题 Why would the caller hold the line?
【正确答案】 B
【答案解析】