Nothing gets people moving faster than the word "fire". When someone yells "Fire!", most people dash for（冲向）the __51__. Their only thought is to get out of the building fast. Firefighters, __52__, race just as quickly toward the fire. They want to put out the fire as fast as possible. There are more than one million firefighters in the United States today. They are trained to put out fires. Back in the 1600s, though, there were no trained firefighters. Putting out fires was __53__ job. Cities and towns had no indoor plumbing, running water, or fire hydrants（消防栓）, so water from a pond, river, or well had to be carried to the fire spot in buckets. When a fire __54__, everyone ran to help. They formed a bucket brigade. Men formed one __55__, leading from the water supply and passed buckets of water to throw on the fire. Women and children formed another line, __56__ empty buckets back to be filled. It was a very slow way to put out a fire, and many houses were burnt to the ground __57__ the fire could be put out. Then in 1736, Benjamin Franklin __58__ up with an idea — set up a fire department. He convinced a group of people in Philadelphia to __59__ the Union Fire Company. They became the first official volunteer firefighters. Today, three out of four American firefighters are volunteers. These brave men and women do not get paid __60__ their work, but they are in good company. George Washington, Thomas Jefferson, and Paul Revere were all volunteer fire fighters, in their days.