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？

A．Teach airhostesses and help them with problems．

B．Be the pilot．

C．Carry luggage for the passengers．