What book is this passage from? I found this passage on 北京大学's website but I can't even go back to the page of contents. I want to know the name of the book。it's the 阅读 section of the site.
https://www.purpleculture.net/chinese-course-learn-mandarin-grade-1-set-3-vol-2-p-20401/
对外汉语本科系列教材
一年級教材
汉语教程
第三冊
下
Chinese Course - Learn Mandarin Grade 1 Set 3 Vol 2)


第九十一课 Lesson 91
一、课文: 妻子的秘密