[Groff] Using variables from register within fractions or equations

[maouinin]

What would be the best way to use a regularly incremented variable within
fractions? 

I teach ESL and I hope to typeset cloze tests where selected individual
words are replaced by a blank space (a short line or underscore) which has
the question number printed below it. I have done this in LaTeX by using
fractions within the math environment paired with a counter as the
denominator:

\newcommand{\pq}{\hspace{1mm} \stepcounter{qnum} 
                      \begin{math} 
                                _\frac{\hspace{3cm}}{\theqnum} 
                      \end{math} 
and the following:

I am honored to be with you today at your commencement...

becomes:
I am h_______ to be with you today at your c________ ...
             1                                                      2

Is this possible with groff, using eqn perhaps? Is it possible to use
variables from number registers within equations or fractions?
-- 
View this message in context: 
http://old.nabble.com/Using-variables-from-register-within-fractions-or-equations-tp33299025p33299025.html
Sent from the Groff - General mailing list archive at Nabble.com.