611.What do you think of the talk given by Professor Smith last night?
I think you'd call it a lecture ______ a talk.
A.other than
B.as well as
C.regardless of
D.rather than
612.Did you tell Holmes about what happened to the train?
No,I didn't.He had rushed off towards the station _______ I could say anything more.
A.until
B.beofore
C.when
D.as