In a small town, people had dug wells to ____ clean water from the ____ to the surface. One day, they noticed that the water was not pure, rather ____. The citizens couldn't understand what caused the problem and ____ many days with the smelly water. They began to ____ complain about the problem. Even though the town leaders ____ to solve problems on their own, they finally decided to find help. They ____ the problem to an expert, who discovered that a very ____ ____ had dropped its excessive cones into the well. Over time, the cones broke down and became ____, which caused the smell. The expert explained how to clean the well, and the people regained their ____ water.

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