If he _______, don’t interrupt him.
No sooner _____ on the TV than I heard the news that the stampede in Cambodia’s capital, Phnom Penh, had left 375 victims dead.
It is estimated that the novel will be _____ of his best sellers, for his novels are quite popular among young people.
The computer system broke _____ suddenly while he was searching for information on the Internet.
He was so busy that _____ I could say hello to him he had rushed out of the room.
If we work hard with a strong will, we _____ overcome any difficulty, however great it is.