The experts were doing their experiment in the lab, __________ what happened outside.
He used to be a successful businessman, but drug ____ his ruin.
The young mother couldn’t make herself______ attention to because the baby was concentrating on his toys.
The teacher always tells her students that only if ________ hard _________ achieve success.
Could you drive me to the bookstore at noon if________? A. it’s convenient of you B. it’s convenient to you C you are convenient D. you will be convenient
Children should be taught at an early age to keep ______even in a difficult situation.