Posted: 09/04/2017
Hi Serge and Happy New Year for you and all friends!Allow me, please, to formulate a suggestion, as following:To mark in some way the test properly solved after each lesson, in order to know what you should solve in the future and to see your progress.This could help everyone to solve every single lesson issue/task in order to get the Certificate, at the end of the course.If this option exist on this site, please, let me know how to access it.Thank you, again and best wishes for the New Year 2015!With friendship,Chris