有没有更有效/更优雅的方法来调整线条样式？

Question

我正在使用该类exam，并想更改\fillin命令，使其产生虚线而不是实线。因此，我将命令定义复制并粘贴到我的序言中，并在适当的位置替换，如下所示\dotfill：\hrule

\documentclass{exam}

\makeatletter

\def\@fillin@relay[#1]{%
  % The first argument is in \fillin@ans, the second is #1.
  \leavevmode
  \ifprintanswers
    \rlap{\raise -\answerclearance \hbox to #1{\hrulefill}}%
    \begingroup
      \setbox0 \hbox{\color@begingroup
             \CorrectChoice@Emphasis \fillin@ans \color@endgroup}%
      \ifdim\wd0 > #1\relax
        \hbox{\CorrectChoice@Emphasis \fillin@ans}%
      \else
        \hbox to #1{\CorrectChoice@Emphasis \hfil \fillin@ans \hfil}%
      \fi
    \endgroup
  \else
    \raise -\answerclearance \hbox to #1{\dotfill}%
  \fi
}% @fillin@relay

\makeatother

\begin{document}


    \begin{questions}

    \question Because I was so tired I \fillin on the bed. (lay/laid)

    \end{questions}


\end{document}

这可行，但我真的需要将所有这些内容都添加到序言中吗，或者有没有更好/更有效的方法来做到这一点？

Answer 1

你可以做类似的事情

\documentclass{exam}


\newcommand\dotfillin{{\let\hrulefill\dotfill\fillin}}

\begin{document}


    \begin{questions}

    \question Because I was so tired I \dotfillin\ on the bed. (lay/laid)

    \end{questions}


  \end{document}