272. Because of the role he played in freeing the African-American from slavery, Abraham Lincoln is ______ as one of the _______ of all American presidents .
Black clouds had completely ___ the sun.
It was an unpleasant subject ____ we _____ for a long time.
It must have rained last night, ________ the ground is wet now.
The serious expression of the captain kept his crew _________.
The tomato juice left some _____ on a customer’s skirt, which made the waitress nervous.