\input color %allows colored answers
\def\underline#1{\vbox{\hbox{#1}\vskip 1pt\hrule\vskip-1pt}}
\long\def\question#1#2{%question and answer
\par\noindent #1
\bigskip

\def\vfilll{\vskip0pt plus 1filll}
{\color{blue}#2}
\vfilll \penalty-200}