Dear gang,

Consider the following (also attached):

=====choice-cs.tex====
\def\CHOICE#1#2{\leavevmode\vbox{\tabskip=0pt\everycr={}
                 \halign{\strut\hfil##\hfil\cr#1\cr#2\cr}}}

\setuppagenumber[state=stop]
\setupwhitespace[big]

\starttext
(One~* Two~* Three~* Four) is even.

(\CHOICE{x}{One}~* \CHOICE{1}{Two}~* \CHOICE{x}{Three}~* \CHOICE{2}{Four})  
is even.
\stoptext
======================

What is best way to define the \CHOICE macro without low-level TeX  
commands, only high-level ConTeXt commands? Thanks in advance and

Best wishes
Idris
-- 
Idris Samawi Hamid
Professor of Philosophy
Colorado State University
Fort Collins, CO 80523