---Do you know why people set off fireworks ? --- Well, in ancient China, people set off fireworks on New Year’s EVE that the loud noise could drive away bad spirits .
We decided ____ for some tea for two hours in the teahouse.
Beijing, the capital of China, is one of _____ cities in the world.
There is _____ wrong with this computer. It doesn't work well.
Paul and I ______ tennis yesterday. He did much better than I.
_______ do you play football? — Once a week.