录音中女士问男士在哪里工作，男士回答说“I work in the Quality Assurance Department at Sonic Laboratories. I don’t know if you know the company.（我在索尼克实验室质量监管部门工作。我不知道你是否听说过这家公司。）”，由此可知，二人是朋友，而不是同学或同事。故B项正确。
【录音原文】
　　W：Where do you work?
　　M：I work in the Quality Assurance Department at Sonic Laboratories. I don’t know if you know the company. We produce very specialist medical equipment for hospitals. That might sound a bit dull to a non-engineer but actually I find the job fulfilling. It’s good to know that you’re helping people to overcome difficulties.
　　W：Yes. I can imagine that must be very satisfying. So what are you working at the moment?
　　M：A big project in Malaysia. We’re opening a new factory there and I’m responsible for setting up quality procedures.
　　W：That sounds very interesting.
　　M：It is, and challenging too. It’s very busy at the moment as I’m doing a lot of traveling and that’s a bit hard on my family, but otherwise I really enjoy the work.