It was reported that 115 miners          in the flooded mine for eight days were pulled out alive at last.

 Hours of playing violent video games can affect the way the brain works, ______ damage to certain cells of brain. 

You can’t imagine what difficulty I had ________ you home.

Don't spend time beating on a wall, ________ to change it into a door.

 The policeman kept his eyes________on the screen of the computer to identify the criminal's footprints.