Tabela com células vazias

Origem: Tex-Br, a enciclopédia livre.

\begin{table}[!ht]
\caption{Cronograma}
  \begin{center}
    \begin{tabular}{|l|l|l|l|l|l|l|l|}
     \hline
     Nível & Domingo & Segunda & Terça & Quarta & Quinta & Sexta & Sábado \\
     \hline
     a &  &  &  &  &  &  &  \\
     \hline
     b &  &  &  &  &  &  &  \\
     \hline
     c &  &  &  &  &  &  &  \\
     \hline
     d &  &  &  &  &  &  &  \\
     \hline
     e &  &  &  &  &  &  &  \\
     \hline
     f &  &  &  &  &  &  &  \\
     \hline
    \end{tabular}
  \end{center}
\end{table}

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\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{geometry}
\usepackage{palatino}
\usepackage{longtable} %para tabelas maiores que uma página
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\begin{document}
\begin{figure}
  \begin{center}
  \includegraphics[height=0.6728in,width=0.6676in]{logoufc2.eps}
  \end{center}
\end{figure}
\begin{center}

  UNIVERSIDADE FEDERAL DO CEARÁ

  CENTRO DE HUMANIDADES

  DEPARTAMENTO DE CIÊNCIAS DA INFORMAÇÃO
\end{center}
\vskip0.2in
\begin{center}
 \textbf{Curso de Biblioteconomia}
 \vskip0.2in

 \underline{Ficha para Controle de Orientação da Monografia}
 \vskip0.3in

 \textbf{Título da Monografia:}\,\rule{118mm}{0.5pt}
 \vskip0.1in
 \hspace{135pt}\rule{118mm}{0.5pt}
 \vskip0.1in
 \textbf{Orientador:}\,\rule{140mm}{0.5pt}
 \vskip0.1in
 \textbf{Aluno:}\,\rule{150mm}{0.5pt}
\end{center}
\vskip0.1in
%\begin{longtable}{lp{10cm}}
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\hline
Etapas de & \multicolumn{1}{c|}{Rubrica do} & Assunto & \multicolumn{1}{c|}{Visto     do(a)} \\
\multicolumn{1}{|c|}{\underline{Acompanhamento}} & \multicolumn{1}{c|}{Aluno} &  &  Orientador(a) \\

Mês/Dia/Hora &  &  &  \\
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01.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
 &  &  &  \\
 &  &  &  \\
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02.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
\hline
03.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
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04.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
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05.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
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06.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
\hline
07.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
\hline
08.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
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09.\rule{1.5cm}{0.5pt}\,/\rule{1cm}{0.5pt}
\quad\rule{1.5cm}{0.5pt}\,:\rule{1.5cm}{0.5pt}
&  &  &  \\
&  &  &  \\
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