答案1
\documentclass{article}
\usepackage{enumitem}
\usepackage{tabto}
\begin{document}
\begin{enumerate}[label=\alph*)]
\NumTabs{4}
\item text \tab{\rule{6cm}{0.15mm}}
\item text text \tab{\rule{6cm}{0.15mm}}
\item text text text \tab{\rule{6cm}{0.15mm}}
\end{enumerate}
\end{document}
使用 makebox 的另一种选择
\documentclass{article}
\usepackage{enumitem}
\begin{document}
\begin{enumerate}[label=\alph*)]
\item \makebox[3cm][l]{It would be nice} \makebox[2cm][l]{\rule{2cm}{0.3mm}}
\item \makebox[3cm][l]{It would} \makebox[2cm][l]{\rule{2cm}{0.3mm}}
\item \makebox[3cm][l]{It } \makebox[2cm][l]{\rule{2cm}{0.3mm}}
\end{enumerate}
\end{document}