My best friend Stephen swims fastest__________ us three.

MrWang is a man of few words,but quick in mind—____,you know 

Be careful that he was in ________ mood (情绪) today.He may be angry with you.

Some of the old beliefs passeddown from one generation to another ________ the present thinking.

For many cities in the world, there is no room to spread out further, _____ New York is an example.