—Robert is indeed a wise man.—Oh, yes. How often I have regretted ______ his advice!
_____ the doctors really doubt is _____ my mother will recover from the serious disease soon.
The students of the music school study ____.
I’d like to have this rope ____ that wire.
The reason ____he was late was ____he had taken a wrong bus.
The visiting minister expressed his satisfaction with the talk, _________ that he had enjoyed his stay here.