Not sure I can translate it, but basically it means, that students say they will study on a certain evening, but they will make up excuses to not study on that evening. Girl on monday: I promise mum every Wednesday night I will study for Chemistry Mother on Thursday morning: Why did you not study last night like you promised? Girl: Oh you know there was an important T.V program on I wanted to watch. Mother. A T.V program! The truth is you just didn't want to study Definition of PRETEXT : a purpose or motive alleged or an appearance assumed in order to cloak the real intention or state of affairs ( http://www.merriam-webster.com/dictionary/pretext )