Where are your parents?–They ___________ on the ground.

The opening ceremony of the 29th Olympic Games started ______ August 8thin the National Stadium in Beijing. [ ]

I didn’t see you at the party yesterday. Why? — Because I ________ for an important person from America at that time.

____ they ____ a cow yesterday?

The mother with her son ________ at home ________ that snowy night.