With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.
The brave soldier would prefer to _____ rather than ______ and in the end the enemy had to kill him.
is no possibility Bob will win the first prize in the match.
The bad weather discouraged us ______ on the picnic and we had to stay at home.
______hearing the news that a hurricane was______, most of the people hurried to safer places.
----The light in the office is still on. ----Oh, I forget ______.