\documentclass[a4paper]{article}

\usepackage[utf8x]{inputenc}    
\usepackage[T1]{fontenc}
\usepackage{multicol}
\usepackage[lang=NO,box,completemulti,noshuffle,postcorrect,separateanswersheet]{automultiplechoice}    

\begin{document}

\onecopy{1}
{    

%%% beginning of the test sheet header:    

\vspace*{.5cm}
\begin{minipage}{.68\linewidth}
\large\bf Eksamen\\ 22 nov 2012 \\ \end{minipage}
\namefield{\fbox{    
                \begin{minipage}{.3\linewidth}
                  Studentnummer (fire siffer):

                  \vspace*{.5cm} %\dotfill
                  \vspace*{1mm}
                \end{minipage}
         }}

\begin{center}\em
Duration : 10 minutes.

  No documents allowed. The use of electronic calculators is forbidden.

\end{center}
\vspace{1ex}

%%% end of the header
\begin{multicols}{3}\columnseprule=.4pt

\begin{question}{01}
  \begin{choicescustom}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
  \end{choicescustom}
\end{question}

\begin{question}{02}
  \begin{choicescustom}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
  \end{choicescustom}
\end{question}

\begin{question}{03}
  \begin{choicescustom}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
  \end{choicescustom}
\end{question}

\begin{question}{04}
  \begin{choicescustom}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
    \wrongchoice{}
  \end{choicescustom}
\end{question}


\end{multicols}

\begin{questionmult}{pref}    
  Among the following cities, which ones are french prefectures?
  \begin{choices}
    \correctchoice{Poitiers}
    \wrongchoice{Sainte-Menehould}
    \correctchoice{Avignon}
  \end{choices}
\end{questionmult}

\clearpage    

}   

\end{document}

