语音讲解：
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　　Wang Hai: What kind of book have you got?

　　Zhang Hua: A children's story book. What's your book about?

　　Wang Hai: It's science fiction. It's about man's future life.

　　Zhang Hua: Which book is more interesting?

　　Wang Hai: It's hard to say. Some people think science fiction is more interesting than children's stories, but others may prefer children's stories to science fiction.

　　Zhang Hua: Right. But I know many people like detective stories.

　　Wang Hai: I like detective stories, too. They are the most interesting stories of all. But we must read different kinds of books.

　　Zhang Hua: I agree.