在文档末尾显示基于特定环境的答案

Question

我正在为我的学生制作一份数学练习清单。下面是我用来创建清单的环境示例：

 \documentclass[10pt,a4paper,oneside]{article}
 \usepackage[utf8]{inputenc}
 \usepackage[brazil]{babel}
 \usepackage{amsmath}
 \usepackage{amsfonts}
 \usepackage{amssymb}
 \newcounter{questionnumber}
 \newcommand{\makequestion}[2]{\refstepcounter{questionnumber}\par\vspace{1em}\noindent\textbf{(#1\hspace{0mm}-\hspace{0mm}\textbf{#2})\hspace{1mm}Question\hspace{0.3em}\thequestionnumber.}\\\vspace{-4mm}\ignorespaces}
 \newcounter{lettercounter}[questionnumber]
 \newcommand{\alternative}{(\alph{lettercounter})}
 \newenvironment{options}{\begin{list}{\alternative}{\usecounter{lettercounter}}}{\end{list}}



 \begin{document}

 \makequestion{MIT}{2014}

 What do you think about life?
 \begin{options}
 \item I think it's a word.
 \item I think it's not a word. 
 \end{options}

 \makequestion{MIT}{2011}

 Is it a boy or a girl?
 \begin{options}
 \item A boy
 \item Yes. 
 \end{options}

 \end{document}

我想在文档末尾制作一个答案，其结构如下：

问题 1 - A

问题 2 - B

但我不知道该怎么做。你能帮助我吗？

Answer 1

你可以使用专用包，而不是自己定义所有内容，例如exsheets.然后您可以轻松地在文档末尾打印解决方案：

\documentclass{article}
\usepackage[utf8]{inputenc}

\usepackage{exsheets}

% cloning the exercise headings from the question:
\DeclareInstance{exsheets-heading}{myheading}{default}{
  join = {
    title[l,B]subtitle[r,B](0pt,0pt) ;
    title[r,B]number[l,B](.333em,0pt)
  } ,
  attach = {
    main[l,vc]title[l,vc](0pt,0pt) ;
    main[r,vc]points[l,vc](\marginparsep,0pt)
  }
}
\SetupExSheets{
  headings = myheading ,
  subtitle-format = \bfseries\mysubtitleformat ,
  question/name = Question ,
  solution/name = Question
}
\newcommand*\mysubtitleformat[1]{(#1)\space}

% define a list options which enumerates (a), (b), ...    
\usepackage{enumitem}
\newlist{options}{enumerate}{1}
\setlist[options]{label=(\alph*)}

\begin{document}

\begin{question}[subtitle=MIT-2014]
  What do you think about life?
  \begin{options}
    \item I think it's a word.\label{MIT-2014-solution}
    \item I think it's not a word.
  \end{options}
\end{question}
\begin{solution}
  \ref{MIT-2014-solution}
\end{solution}

\begin{question}[subtitle=MIT-2011]
  Is it a boy or a girl?
  \begin{options}
    \item A boy
    \item Yes.\label{MIT-2011-solution}
  \end{options}
\end{question}
\begin{solution}
  \ref{MIT-2011-solution}
\end{solution}

\section*{Solutions}
\SetupExSheets{headings = runin}
\printsolutions

\end{document}