[RbnJrg]

Originally Posted by robertmchicago

Thanks a lot for the suggestion!
I already have tested these codes:
page-break-after: always;
break-after: always;
They work in Kindle Previewer and ADE 2.0, but not in Kobo Desktop.

Kobo Desktop? Who reads in Kobo Desktop nowadays? It's the worst desktop ereader, riddled with bugs. If you buy a Kobo ebook is because you have a Kobo physical device. So if that's your concern, forget about Kobo Desktop and use the solution Turtle91 gave you, forcing page-breaks with:

<p class="answer">Answer to question #x</p>

.answer {
  page-break-after: always !important;
  break-after: always !important;
  -moz-column-break-after: always !important;
  -webkit-column-break-after: always !important;
}