Match the sentences from the two columns and complete the mini-dialogues. 1.good evening. 2.let me introduce my friend alex. 3.i haven't seen you for ages. 4.i'll see you tomorrow then. 5.how are you? 6.excuse me,is anybody sitting here? a) pleased to meet you. b)fine,thanks. c)hello! d) i'm afraid this seat is taken. e)goodbye! f)i didn't recognize you!