Wonder Girls’ Yenny, TV personality Lee Jun-seok and actor Sam Hammington participated in Model U.N. during the shooting of JTBC variety program “Off to School.”For this week’s episode of the program, celebrities visited Cheongshim International Academy where they had an opportunity to debate on the topic of the Syria crisis. Due to the characteristics of Model U.N., the entire debate was done in English with each participant defending his or her assigned country. The celebrities were said to be very prepared and critical throughout the entire process and be very fluent in English as well. Lee especially, with a Harvard background, presented a keen argument while Yenny used the speech to wisely defend her side. The episode of the celebrities and students in a heated debate is set to air Tuesday at 9:30 p.m. on JTBC. By Lee Hye-won ()