如何定义选择而不是任务并在最后打印答案

Question

我正在尝试编写一些客观题或多项选择题。任务除了以下两点之外，这个软件包可以完成这个工作：

1. 我想写 \begin{choices} 和 \choice; 而不是 \begin{tasks} 和 \task

2. 我想包含和选项 \correctchoice 并打印所有答案等。

我尝试阅读文档，但无法做到这一点。请帮助我。

\documentclass[12pt]{article}
\usepackage{tasks}
\usepackage{exsheets}
\SetupExSheets[question]{type=exam}
\begin{document}
\begin{question}
    Which one of the entries does not fit with the others?
    \begin{tasks}(4)
        \task mercury
        \task iron
        \task lead
        \task zinc
    \end{tasks}
\end{question}
\settasks{
    counter-format=(tsk[a]),
    label-width=4ex
}
\begin{question}
    What is a function?
    \begin{tasks}(2)
        \task A dancing electron
        \task A dancing proton
        \task A dancing neutron
        \task A Dixie Dancing Duck
    \end{tasks}
\end{question}
\end{document}

Answer 1

现在（问题发布两年多后），使用exsheets' 后继者可以相当容易地xsim实现您想要的目标。下面的示例定义了choices如下环境：

\NewTasksEnvironment[
  label = (\alph*) ,
  label-width = 16pt
]{choices}[\choice]

answer然后定义一个练习属性和一个保存答案的命令：

\DeclareExerciseProperty{answer}    
\newcommand*\answer[1]{%
  \SetExpandedExerciseProperty{answer}{ (\alph{task}) \unexpanded{#1}}%
 #1%
}

最后定义一个检索答案的命令：

\newcommand*\getanswers{%
  \def\betweenanswers{\def\betweenanswers{\hspace{2em}}}%
  \ForEachUsedExerciseByID{%
    \betweenanswers##3\ExercisePropertyGet{##1}{##2}{answer}%
  }%
}

然后像这样使用——语法不完全符合要求但非常接近：

\begin{exercise}
  Which one of the entries does not fit with the others?
  \begin{choices}(4)
    \choice mercury
    \choice iron
    \choice \answer{lead}
    \choice zinc
  \end{choices}
\end{exercise}

完整代码：

\documentclass[12pt]{article}
\usepackage[no-files]{xsim}
\usepackage{tasks}

\NewTasksEnvironment[
  label = (\alph*) ,
  label-width = 16pt
]{choices}[\choice]

\DeclareExerciseProperty{answer}    
\newcommand*\answer[1]{%
  \SetExpandedExerciseProperty{answer}{ (\alph{task}) \unexpanded{#1}}%
 #1%
}

\newcommand*\getanswers{%
  \def\betweenanswers{\def\betweenanswers{\hspace{2em}}}%
  \ForEachUsedExerciseByID{%
    \betweenanswers##3\ExercisePropertyGet{##1}{##2}{answer}%
  }%
}

\xsimsetup{
  exercise/name = Question ,
  exercise/the-counter = \arabic{exercise}.
}

\begin{document}

\section{Questions}
\begin{exercise}
  Which one of the entries does not fit with the others?
  \begin{choices}(4)
    \choice mercury
    \choice iron
    \choice \answer{lead}
    \choice zinc
  \end{choices}
\end{exercise}

\begin{exercise}
  Which one of the entries does not fit with the others?
  \begin{choices}(4)
    \choice argon
    \choice \answer{hydrogen}
    \choice neon
    \choice helium
  \end{choices}
\end{exercise}

\section{Answers}
\getanswers

\end{document}