Askateachertonamethemostannoyinginventionofrecentyearsa...
問題詳情：Askateachertonamethemostannoyinginventionofrecentyearsandtheywilloftenmentionthemobilephone.Disturbedbytheproblemstheycreate,manyheadteachershaveorderedthatpupilsshouldkeeptheirphonesswitchedo...