【正确答案】 A

【答案解析】[听力原文]19-22
Interviewer: Excuse me. I wonder if you'd mind answering a few questions. I'm doing a survey about foreigners studying in Britain.
Interviewee: Oh, I see. Well, no, I don't mind at all.
Interviewer: Oh, good. Where are you from, please?
Interviewee: I'm sorry. I didn't hear ...
Interviewer: What country are you from?
Interviewee: People's Republic of China, Shanghai, actually.
Interviewer: Could you tell me how long you've been here?
Interviewee: Yes, about 3 weeks.
Interviewer: I see, and how long will you be studying?
Interviewee: I'm not sure exactly, but I think about 2 months altogether.
Interviewer: And ... er... may I ask how old you are?
Interviewee: Yes, of course, I'm thirty-four.
Interviewer: What kind of educational course you are doing here?
Interviewee: I'm on a language improvement course run by UNESCO.
Interviewer: Very interesting! How long ago did you start to learn English?
Interviewee: Oh, I can't remember exactly, about 20 years ago, I think!
Interviewer: Fine, well, thank you very much. Enjoy you stay in London.
Interviewee: Thank you. Goodbye.
19. What does the interviewer want to know about?