—Is Bob still performing?—I am afraid not. He is said ___ the stage already as he has become an official.
_____ to his research work, the professor cared little about any other things.
His parents always advised him____ too much time on the computer, but he still sticks to doing it.
The soldiers were fighting bravely their people _____ the invaders.
Two dogs_____ a bone, and a third one ran away with it.
Though he failed in the exam this time, he did not.