Susan: I'm so glad to see you, David.【K1】 1 has been such a long time. How are you?
David: I'm fine, and you?
Susan: I'm just wonderful. God, time goes by so quickly! Are you going to the air quality conference in London?
David: I am. And I'm really glad to see you. Just last night I found your name in the conference materials, but it didn't come to my【K2】 2 that we would meet on the plane.
Susan: I'm afraid I haven' t had time to look at【K3】 3 conference materials very carefully. I had no idea you were coming, but I am certainly glad to see you. I was feeling very nervous about going there【K4】 4 friends.
David; I can imagine. My English has gotten not so fluent since I returned from the United States,【K5】 5 I'm rather nervous myself. But I saw that you were【K6】 6 (give) the most important talk at the conference.
Susan:【K7】 7 (frank) speaking, I'm scared to death about it.
David: I'm just giving a talk in one of the workshop sections, and I hope I won' t make all of you【K8】 8 (disappoint).
Susan: But your English is much【K9】 9 (good) than mine.
David: But you' re now the Director of the Air Quality Institute, so you【K10】 10 know the technical terms.
Susan: Maybe. But I still can't understand totally a lot of technical terms in my field. 【K1】