\textbf{48 -- Identify the correct sentence for the blanks:}
I went with eleven of my colleagues to the library at seven in the morning, two colleagues returned from us and we remained with five hours there. When we returned, the number of people was \ldots.. and the time was \ldots..
\begin{enumerate}
\item[(1)] ten / twelve! \hspace{2cm} (2) nine / twelve!
\item[(3)] ten / the twelfth! \hspace{2cm} (4) nine / the twelfth!
\end{enumerate}