听力原文：M: Aren't you the woman who gave the computer seminar at the city library last winter? W: Yes, I am. I thought you looked familiar. M: I' m so glad I took your seminar. I thought that it would be impossible for me to learn how to operate a computer at my age, but now I'm exchanging e-mails with my grandchildren. W: That' s great. It was a good experience for me, too, because it was a change of pace from my daytime job as a sales representative. What did the woman do last winter?