Lorem ipsum dolor sit [...]
risus. Suspendisse

\begin{flushleft}
tortor, dignissim [...] dolor.
Cras elementum
\end{flushleft}

\begin{center}
diam. Maecenas ligula [...] non, mi.
\end{center}

\begin{flushright}
Orci nec nonummy [...] Duis semper.
\end{flushright}