He had been so absorbed __________ watching the carpassing by that he didn't notice his friends __________.
__________ to give up smoking, he threw away his __________ cigarettes.
He always __________ the mistakes made by his rivals.
He's decided to move to another city, because __________ doesn't agree __________.
—Did Peter fix the computer himself?—He __________,because he doesn't know much aboutcomputers.
It has been raining hard these days, so the wheatwill be saved __________ the heavy rain. Which of thefollowing is wrong?