Then Job answered the LORD is another of the many prose introductions to speeches in the book. It is identical to 40.3. In spite of this identification, Good News Translation puts “Job” before verse 2.
Quoted with permission from Reyburn, Wiliam. A Handbook on Job. (UBS Helps for Translators). New York: UBS, 1992. For this and other handbooks for translators see here .