Relier Pairs matching AVersion en ligne matching par Kristina Topalova 1 Everyone was wearing their character costumes when... 2 We were rehearsing for a school play last night when... 3 A group of young children arrived while... 4 The alarm rang while... 5 They were laughing at us when... we went outside to the playground. we were singing the last song. the teacher told them to stop. an embarrassing thing happened. we were waiting for the firefighters to come.