——This wall of air is an effective answer to the problem and it ____ work. ——But it is a question to put such a wall of air around the statue.
The science lab being built in our school is ____________ the former one.
________ we looked at it, the better we liked the oil painting.
—What a mistake! —Yes. I ________ his doing it another way, but without success.
—Simon is watching TV. —He's watching TV? He's ________to be cleaning his room.
—Can I use your telephone?—________.