The boy lay on his back, with his teeth______, his right hand_______, and his glaring eyes ________ _straight upward.
The mother asked her son________.
After the examination,my teacher told me that failure _______the mother of success.
He told us he _______a concert________.
—I’d love to make friends with the boy ____ you think is easy to _____.—OK. I’ll introduce you to him at the party.
I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time.