physics在第五个话轮中男士回答说，I have been studying physics....，即其专业是物理学。

W: Come in, Mr Wang. My name is Mary Henderson. How do you do?
M: How do you do?
W: Please sit down. I hope you had no problems getting here from China.
M: No, it was very easy.
W: Good, Now I’d like to check a few details. You’re twentyone, aren’t you?
M: Actually I’m twenty-two.
W: And when did you leave school?
M: When I was 18.
W: What have you been doing since then?
M: I have been studying physics at Tsinghua University.
W: That’s a useful subject for pilots. Tell me, what are your reasons for wanting to be a pilot?
M: I have always wanted to be a pilot. I love planes and I enjoy traveling.
W: Why did you decide to train in England?
M: Because the Oxford Air Training School has an excellent reputation, and English is the international language for pilots.
W: I see. Well, I hope you enjoy the course. Your English is very good. Did you learn it at school?
M: Yes. But I have also studied English in London, and last year I passed the proficiency examination.
W: Oh, that explains it. Do you have any questions?
M: When will we start flying?
W: Not immediately, I’m afraid. You have to start with training on the ground.