听力原文：M: Hi, Helen, what do you think of our class in children's literature? W: It's pretty good. I was surprised to see you there. Are you also majoring in elementary education? M: No, I'm not, but as a psychology major, I can use this to fulfill the requirement in developmental psychology. W: Have you finished the first assignment yet? M: Not yet. I just bought the books today. How about you? W: I started this afternoon. It's great fun reading those wonderful children's stories by Dr. Seuss. M: Dr. Seuss? I don't remember seeing his name on the reading list. W: His full name is Theodor Seuss Geisel. That's how it's listed in the bibliography. Dr. Seuss is his pen name. M: I loved reading those stories as a child. It'll be interesting to read them now from a different perspective. I guess it'll give me a good idea about how children think. W: Those stories are also great for classroom use. M: How is that? W: Well, take a typical Dr. Seuss' book like The Cat in the Hat. It has a controlled vocabulary of only 200 words. M: So that means the children get lots of practice in using a small number of words over and over. W: Exactly. In fact, The Cat in the Hat was written primarily to show how a controlled vocabulary reader could also be interesting and fun. M: Well, it sounds that all these courses are going to be interesting and fun. I think I'll get started on this reading list tonight. (23)