Ling Ling opened a book and saw two pages. The sum of the page numbers of these two pages was 67. What was the sum of the page numbers of the next two pages? According to the plot of the novel, let's assume that this book is a book with a page number on each page. Then the next two pages should be 67+2=69. Therefore, the next two pages that Ling Ling was going to turn to were 69.