Using Special Symbols

Here's one way. Note the new paragraph created by the blank line.
     \documentstyle[12pt]{article}
     \begin{document}

     ``They are that,'' said Humpty Dumpty:
     ``also they make their nest\$ under
     sun-dials---\{also they live on cheese.\}''

     For good measure: \& \% \# \_
     \end{document}