阅读下面短文，根据以下要求：1）汉语提示；2）首字母提示；3）语境提示，在每个空格内填入一个适当的英语单词，并将该词完整地写在下面相对应的横线上。所填单词要求意义准确，拼写正确。
Many people believe fresh water will never be used up. They think fresh water comes from such varieties     sources that is always enough for us. Such opinion      (导致)to surprising waste of water. As a matter of fact, the earth is      of fresh water. Furthermore, with the rapid  g    of the world ‘s population and the serious pollution of our surroundings, the world is     （面对 ）the danger of running out of fresh water.  A    , in some big cities, fresh water cannot meet the  d    needs.  It is up to us to find new ways to  s   water. First, we should make the best      of water. Second, scientists must work even harder to purify (净化)seawater,       (污染) water and try to find solutions to reduce the use of fresh water in industry．