用方框中所给单词的适当形式填空，每词限用一次。(5分)

slowly      swim      one         their        worried

_________ is good for our health.
I am ________ because I’m getting fatter.
Sorry, I can’t hear you clearly. Would you please speak more______?
Teenagers should be allowed to wear _____  own clothes.
Ben was the _______ one to get to school.