Not until he had left his friend _______ how important friendship was for him.
At the beginning of class, the noise of desks______could be heard outside the classroom.
____in red , she looks very beautiful.
Quickly ______himself, he ran out to the street.
_____the program, they have to stay there for another two weeks.
The English are proud of the 30th Olumpic Games______in London in 2012.