Before going abroad he devoted all he could _______ his oral English.
Rarely ________ such a silly thing.
Prices of food in that area ____ sharply since word came that the war would break out soon.
Rather than ____ on a crowded bus, he always prefers _____ a bicycle.
______ Marx's works with Engels', and you'll find many differences.
—Guess what? I have got A for my term paper. —Great!You _______ read widely and put a lot of work into it.