根据下面资料，回答题
Susan: I´m so glad to see you, David.（56）has been such a long time. How are you?
I´ David: 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 con-ference materials, but it didn´ t come to my（57）that we would meet on the plane.
Susan : I´ m afraid I haven´ t had time to look at（5）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（59）friends.
David: I can imagine. My English has gotten not so fluent since I returned from the United States,（60）I´m rather nervous myself. But I saw that you were（61）(give)
the most important talk at the conference.
Susan: （62）(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（63）(disappoint).
Susan: But your English is much（64）(good) than mine.
David: But you´ re now the Director of the Air Quality Institute, so you（65）know The technical terms.
Susan: Maybe. But I still can´ t understand totally a lot of technical terms in my field.
第（56）题答案为