—George, the poor guy, has just bought a big house! Are you joking?—No. ______.
The old man was taking a walk, ____ by his grandson.
An expert was _____ to give a speech on how to learn English well.
Scientists have made a major ____ in cancer research.
His success _______ his hard work.
He slipped and had his leg broken. _______, he will have to be away from school for two or three months.