::
Scusami:
`\documentclass{article}
\usepackage{lipsum,xcolor,calc}
\begin{document}
\lipsum[1]
\begin{itemize}
\item \colorbox{lightgray}{\makebox[\textwidth-3em]{Foo}}
\item \colorbox{lightgray}{\makebox[\textwidth-3em]{Bar}}
\end{itemize}
\lipsum[1]
\end{document}
`Ciao,
L.
