Sarah pretended to be cheerful, ____________ nothing about the argument.
—My God! It will take more than two hours to do all the cleaning!—Oh, _____! We don’t have much time left!
It was the dream of becoming rich _____ attracted people from all over the world to the state, ______ gold was discovered in 1848.
Peru, a country ____ the Pacific coast of South America, gained its independence ______ Spain in 1821.
All witnesses _____ to the traffic accident are required to make their statements.
He apologized for ____able to inform me of the change about the plan in advance.