更改考試類別左邊距中的邊距點

Question

如何將左邊距上的點放在更靠左的位置？甚至嘗試更改一些程式碼，exam.cls但失敗了。

\documentclass[10pt,a4paper]{exam}
\usepackage[latin1]{inputenc}
\begin{document}
\printanswers

\renewcommand{\questionshook}{%
%   \setlength{\leftmargin}{0pt}%
%   \setlength{\labelwidth}{-\labelsep}%
%   \setlength{\marginpointssep}{120pt}%
%   \setlength{\labelwidth}{20pt}
}

\pointformat{/\themarginpoints}
\pointsinmargin
\setlength{\labelwidth}{2cm}

\begin{questions}
\question[3]Answer this question.

\question[3]Answer these questions.
    \hspace{2cm}\begin{parts}
        \part[10]
    Is this a question?
        \part[10]
        Is this a question?
    \end{parts}
\end{questions}
\end{document}

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