Поделитесь своими знаниями, ответьте на вопрос:
B identify the type of situation (formal, neutral, informal) and introduce: a close friend / to your mothera groupmate / to the english teachera senior colleague / to your friendyour teacher / to your parentsyour bank manager / to your brotheryourself / to a new groupmate (colleague)one guest at your party / to another
2. Oh, hi groupmate! (Neutral) / Hello Miss Elena.(formal)
3. Hi, senior colleague.(neutral) / Sup, Alex.(neutral)
Дальше не знаю