The workers and technicians worked hard _____ to get the Great Hall finished before National Day.
It is no use________without doing.
—Can't we go there on foot? —________to take a boat.
David threatened________his neighbour to the police if the damages were not paid.
The old car needs__________,but I have no time to have it________.
The opportunity Jack had looked forward________at last when he was named chief engineer in the project.