Speaker A: Excuse me, Professor Smith, can you spare me a few minutes? There‘ s something I‘ d like to speak to you about. I won‘ t keep you long. Speaker B :__________
A.
Of course not. Haven' t you seen have been pretty busy now?
B.
Well, I' m afraid we have to find some other time. I' m fully occupied now.
C.
No. I' 11 have an important meeting to attend this evening.
D.
Not possible, as I don' t know how long you will keep me.