I had been puzzled over the problem for over an hour without any result, ____ all at once the solution flashed across my mind.
If a person has not had enough sleep, his actions will give him _______ during the day.
The engineers are so busy that they have no time for outdoor sports activities, ________ they have the interest.
These countries ________ too many wars since ancient time.
——How about ____New Year party yesterday evening? —— I think it was _________ success.
——Let’s go and have a good drink tonight. ——__________. Have you got the first prize in the competition?