\documentclass{article}
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\begin{document}

\begin{enumerate}

\item
%{#q}
This is the body of question 1
%{/q}
    \begin{enumerate}
    \item
    %{#o}
    question 1, Item 1
    %{/o}
    \item
    %{#o}
    question 1, Item 2
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    question 1, Item 3
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    question 1, Item 4
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    %{#o}
    question 1, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 2
%{/q}
    \begin{enumerate}
    \item
    %{#o}
    question 2, Item 1
    %{/o}
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    %{#o}
    question 2, Item 2
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    %{#o}
    question 2, Item 3
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    question 2, Item 4
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    question 2, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 3
%{/q}
    \begin{enumerate}
    \item
    %{#o}
    question 3, Item 1
    %{/o}
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    %{#o}
    question 3, Item 2
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    question 3, Item 3
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    question 3, Item 4
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    question 3, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 4
%{/q}
    \begin{enumerate}
    \item
    %{#o}
    question 4, Item 1
    %{/o}
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    %{#o}
    question 4, Item 2
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    question 4, Item 3
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    question 4, Item 4
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    question 4, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 5
%{/q}
    \begin{enumerate}
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    %{#o}
    question 5, Item 1
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    question 5, Item 2
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    question 5, Item 4
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    question 5, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 6
%{/q}
    \begin{enumerate}
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    %{#o}
    question 6, Item 1
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    question 6, Item 2
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    question 6, Item 5
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    \end{enumerate}
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%{#q}
This is the body of question 7
%{/q}
    \begin{enumerate}
    \item
    %{#o}
    question 7, Item 1
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    question 7, Item 2
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    question 7, Item 3
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    question 7, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 8
%{/q}
    \begin{enumerate}
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    %{#o}
    question 8, Item 1
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    question 8, Item 2
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    question 8, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 9
%{/q}
    \begin{enumerate}
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    %{#o}
    question 9, Item 1
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    \end{enumerate}
\item
%{#q}
This is the body of question 10
%{/q}
    \begin{enumerate}
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    %{#o}
    question 10, Item 1
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    \end{enumerate}
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%{#q}
This is the body of question 11
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    \begin{enumerate}
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    %{#o}
    question 11, Item 1
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    question 11, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 12
%{/q}
    \begin{enumerate}
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    question 12, Item 1
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    \end{enumerate}
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%{#q}
This is the body of question 13
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    \begin{enumerate}
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    question 13, Item 1
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    \end{enumerate}
\item
%{#q}
This is the body of question 14
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    \begin{enumerate}
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    question 14, Item 1
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    \end{enumerate}
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%{#q}
This is the body of question 15
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    question 15, Item 1
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    question 15, Item 5
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    \end{enumerate}
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%{#q}
This is the body of question 16
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    \begin{enumerate}
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    question 16, Item 1
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    question 16, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 17
%{/q}
    \begin{enumerate}
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    %{#o}
    question 17, Item 1
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    question 17, Item 5
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    \end{enumerate}
\item
%{#q}
This is the body of question 18
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    \begin{enumerate}
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    %{#o}
    question 18, Item 1
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    \end{enumerate}
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%{#q}
This is the body of question 19
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    question 19, Item 1
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    question 19, Item 5
    %{/o}
    \end{enumerate}
\item
%{#q}
This is the body of question 20
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    \begin{enumerate}
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    %{#o}
    question 20, Item 1
    %{/o}
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    question 20, Item 2
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    question 20, Item 5
    %{/o}
    \end{enumerate}
\end{enumerate} % end of questions items
\end{documents}
