听力原文： I met Susan at a dance about six months ago. We get along well together since we like music, dancing, swimming, and tennis. But whenever I start to get serious about our relationship and try to discuss with her how she feels about me and whether we might consider marriage, she gets angry and refuses to talk about it. Usually, she says something like. “I'm not the marrying kind” or “We're having too much fun to be serious.” Besides all this, I don't think that my parents like her very much. They think that she's not very intelligent. Do you think I should continue to keep the relationship? Or should I forget her? We're both 22, but I' m ready to settle down and establish a home. I have a good job as a salesman and by the time I'm 24 I hope to have saved enough money to start my own business. What is the main topic of the talk?