Hm - This is definitely possible using MediaLab's ability to work with variables. Depending on how you store the response that you want re-displayed to the users, you could either use the value that the variable for that trial generates, or use MediaLab's advanced features to communicate with an excel worksheet that will have an easier time customizing the strings to be used.

More information on MediaLab's advanced features can be found here:
http://www.empirisoft.com/medialab/h...d_features.htm

After you read through the above, let me know if you still need more help - I would be glad to work with you to get this setup.