---What made him so angry? --- _______.
moment he saw Zhao Benshan’s funny performances, he burs into laughter.
Had the weather been good, the children ____ out for a walk.
The news has just ___ that the president is going to visit China next month.
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would ___ remain invisible.
It was foolish of you to take a taxi ___ you could easily walk there in five minutes.