听力原文：My office is at Chicago International Airport. And I spend 60% of my time in the air. I teach airhostesses and help them with any problems. My hours are usually from 8 am to 4 pm, but sometimes I work from 1pm to 9pm. At work, the first thing I do is to check plane times on my computer and then I speak with some of the airhostesses. Sometimes I go on a long flight to check how hostesses are doing. That's my favorite part of job. But I like office work, too. Traveling can be hard work. When I get back from along journey, all I can do is eat something and then go to bed. I don't earn much money, but I'm happy with the United Airlines and want to stay there and continue to travel. What does the author do at the airport?