The workers were so tired that they fell asleep where they ______without undressing.
There was a nice little present for everyone, with a suitable poem _______ to it.
More and more people come to realize that only by _______ high technology can we increase economic power.
Tiger Woods said that he needed to have his attention _____ on being a better husband, father and person.
You look so tired. You _________ have stayed up again.
---Peter, would you like a beer to go with your meal? ---Sure, it _________.