Text before question in exam class

Question

The following example gives a compile error:

   \documentclass{exam}
    \begin{document}
    \begin{questions}
    \section{Section 1}
    Some descriptive text.
    \question A really interesting question.
    \section{Section 2}
    \question Another really interesting question.     
    \end{questions}
    \end{document}

However, compilation works fine after moving "Some descriptive text." to after the first question.

How can I get this to compile and still have a properly indented section header and descriptive text? Note that if I didn't care about consistent section header/text indentation I could just move them to before "\begin{questions}".

This question is relevant, but not the same: How to use section in exam class.

Answer 1

You can insert a box with proper \leftskip:

\documentclass{exam}
\begin{document}
\section{Section 1}
Some descriptive text
\begin{questions}
  \section{Section 1}
  \vbox{\leftskip\leftmargin Some descriptive text.}
  \question A really interesting question.
  \section{Section 2}
  \question Another really interesting question.     
\end{questions}
\end{document}