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使用考试类显示答案（vbox 中的行太多 - 分成两列）

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使用考试类显示答案（vbox 中的行太多 - 分成两列）

我使用考试类在我的几门课程中编写多项选择题测试。我使用以下代码收集正确答案，然后在测试结束时使用命令 \showallanswers 显示正确答案。

%%%%%start code for printing answers
\CorrectChoiceEmphasis{} %% removes question answers being boldface on test 
\newbox\allanswers
\setbox\allanswers=\vbox{}
\newenvironment{answer}
{%
 \global\setbox\allanswers=\vbox\bgroup %
  \unvbox\allanswers%
    \thequestion. \thechoice\\ 
}%
{%
 \egroup%
}
\newcommand{\CC}{\CorrectChoice  \leavevmode\begin{answer}\end{answer}}% New command \CC replaces \correctchoice from exam.sty and saves answers in the box \allanswers .
\newcommand{\showallanswers}{%
\ifprintanswers \centering Here are the answers: \par \usebox\allanswers \fi}
%%%%%end code for printing answers

只要测试包含约 35 个或更少的问题，这种方法就完美了。如果测试包含更多问题，则答案键会被截断，并且不会显示超过 35 个的所有答案。我怀疑这是因为使用 vbox 来显示答案，而单个页面没有足够的行数。如果您能帮助修改上述代码以适应更长的测试，我将不胜感激。如果需要，有没有办法让答案键使用两列？我尝试编辑代码并应用 multicols 包，但我的宏制作技巧并不好。

提前非常感谢您。

这是一个更完整的 MWE，它可以编译整个文档：

\documentclass[addpoints,answers]{exam}
\usepackage[margin=1in]{geometry}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{graphicx}
\usepackage{multicol}
\footer{}{Page \thepage}{}
\pagestyle{headandfoot}
\title{Exam Title}
\header{Course}{Test 1 --- Form A}{Spring 2023}
%\footer{Page \thepage\ of \numpages}
%{}
%{Points earned: \makebox[.5in]{\hrulefill}\\ 
%out of a possible \pointsonpage{\thepage} points}

%%%%%start code for printing answers
\CorrectChoiceEmphasis{} %% removes question answers being boldface on test 
\newbox\allanswers
\setbox\allanswers=\vbox{}
\newenvironment{answer}
{%
 \global\setbox\allanswers=\vbox\bgroup %
  \unvbox\allanswers%
    \thequestion. \thechoice\\ 
}%
{%
 \egroup%
}
\newcommand{\CC}{\CorrectChoice  \leavevmode\begin{answer}\end{answer}}% New command \CC replaces \correctchoice from exam.sty and saves answers in the box \allanswers .
\newcommand{\showallanswers}{%
\ifprintanswers \centering Here are the answers: \par \usebox\allanswers \fi}
%%%%%end code for printing answers

\begin{document}
\begin{center}

\fbox{\fbox{\parbox{5.5in}{\centering
 INSERT EXAM INSTRUCTIONS HERE.}}}
\end{center}
\vspace{0.1in}
\makebox[\textwidth]{Name:\enspace\hrulefill} \\ 
 
\begin{questions}
     \question[2] What is the answer?  
     \begin{choices}
     \choice Option 1
     \choice Option 2
     \CC Option 3
     \choice Option 4
     \end{choices}


\end{questions}
\newpage
\showallanswers
\end{document}

答案1

我通过查看帖子找到了解决方案

考试包中的多项选择题答案位于文档末尾

线路

\ifprintanswers \centering Here are the answers: \par \usebox\allanswers \fi}

被修改为

\ifprintanswers \centering Here are the answers: \par \unvbox\allanswers \fi}

然后答案列表被分成多页。

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