【正确答案】 A

【答案解析】[听力原文]
David: It seems that only half of the students passed the final examination.
Jacqueline: Well, it doesn"t surprise me at all, you know. The exam was very difficult this time.
David: Well, I"m really surprised. There are many students who definitely didn"t fail. According to Jack, there are eight boys in his class who failed, including Scott.
Jacqueline: No! I don"t believe it! Scott is one of the top students in the college. What about his sister? Did she pass?
David: Oh, yes. It seems she got good marks.
Jacqueline: That"s absolutely incredible! Scott was a much better student than his sister, and has been working so hard for the last few months.
David: It seems unfair, doesn"t it? But, from what I"ve heard, perhaps he worked too hard. He was ill during the week of the exam.
Jacqueline: Oh, I see. These things happen, sometimes. I suppose the dean will take his illness into account and give him a pass.
David: Well, there"s a rumour going around that the head of the Department is leaving.
Jacqueline: Because of the bad result, you mean?
David: Well, I suppose so. I"m not sure. Maybe, Mr. Smith is going to be the new Department Head.