[REBOL] [REBOL]Formatting variables in strings

[tjohnson]

the following code:
test: 4
print reform ["the numbers are:" test "and" [test+1]]
;prints 
the numbers are: 4 and test+1

how can I print out : 
the numbers are: 4 and 5

in other words, I want to evaluate test+1 to 5

thanks
tim