transkript: 20. Which of the followıng staıemems is one of me dısauvantages of using audıo materials for przctıcing Iıstenıng skills? A) Recorded lracks can be mayer! dıreclly from computers B) Audwo matenals are offered ın dwgılaî form cı Students are provıded wılh venous situatıons D) Students hear a vaneıy of dılferent vowces apart from teacher s voice. E) Everyone has to hslen at the same speed