That night Tom drove his car at ________we thought a dangerous speed.
Scientists think that the continents ____ always where they ___today.
--- Would you tell me ___ you want your tea, with sugar or milk?--- Sugar, please.
Leaves are found on all kinds of trees, but they differ greatly __ size and shape.
He began to take political science_____ only when he left school.
I can't say which wine is best-it's a (n) ___ of personal taste.