Read the passage below and fill in each blank space with the appropriate word.
The
___(1)___ common way for germs to spread from one person to another or from animals to people is
___(2)___ drinking water. Drinking water from a tap is not possible for everybody
___(3)___ wells and springs can be kept clean. Wells need a fence around them to prevent animals from falling
___(4)___. People might not notice that there was a dead animal in the well. Then it would rot and every one would become
___(5)___ from the water.
___(6)___ can put germs into springs and water-holes with their feet and tongues if they drink from them. Springs and water-holes need a
___(7)___ around them too. Best of all, drinking water sources should be covered and water taken
___(8)___ with a pump. People must not use the grass or brushes near a source of drinking water as
___(9)___. The
___(10)___ can easily be washed into the water by the rain.
