I 've often______ (1) that Stefan's success as a teacher is due to hiseccentricity as much as his knowledge of the subject. From the first time he ever______( 2) into a classroom, students have a lways loved him. They 've probably_____( 3) met anybody who displays such an extraordinary mixture ofenthusiasm and great personal warmth. It _____( 4 ) also probably the first timethey've______ (5 ) somebody who always wears a leather jacket and a scarf evenat the height of summer.