____to my regret, I am unable to accept your warm invitation.
The visiting Minister expressed his satisfaction with his talk,__________ that he had enjoyed his stay here.
--Can I help you?--I'd like to buy a present for my father's birthday, ___________ at a proper price but of great use.
My pain ___________ obvious the moment I walked into the room, for the first man I met asked me pitifully:" Are you feeling all right?"
The fire started in the basement and quickly____________ to the first floor where it destroyed all the______________ in the language lab.
What he has done is far from___________.