阅读下面材料，在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式

Are you facing a situation that looks impossible to fix?

In 1969，the pollution was terrible along the Cuyahoga River near Cleveland，Ohio.It   1   (be) unimaginable that it could ever be cleaned up.The river was so polluted that it   2  (actual) caught fire and burned.Now，years later，this river is one of   3   most outstanding examples of environmental cleanup.

But the river wasn't changed in a few days   4   even a few months.It took years of work   5   (reduce) the industrial pollution and clean the water.Finally，that hard work paid off and now the water in the river is   6  (clean) than ever.

Maybe you are facing an impossible situation.Maybe you have a habit   7   is driving your family crazy.Possibly you drink too much or don't know how to control your credit card use.When you face such an impossible situation，don't you want a quick fix and something to change immediately?

While there are   8   (amaze) stories of instant transformation，for most of us the    9  (change) are gradual and require a lot of effort and work，like cleaning up a polluted river.Just be   10  (patience)．

1．was　[文章讲的是1969年的事情，故用过去时。]

2．actually　[修饰动词caught，用副词actually“实际上”。]

3．the　[most outstanding是最高级，前面需要加the。]

4．or　[河流不是几天或者几个月里就改变了的，这里两个时间是选择关系，故用or。]

5．to reduce　[这里考查固定句型：It takes some time to do sth“做某事花费多长时间”。故应填不定式to reduce。]

6．cleaner　[根据下文than知用形容词的比较级。]

7．that/which　[habit是先行词，故用that/which引导定语从句。]

8．amazing　[是“令人吃惊的”，用形容词修饰名词stories，而amazed指“人感到吃惊的”，用来修饰人。]

9．changes　[根据句子的谓语“are”可知主语应为复数。]

10．patient　[根据空格前系动词“be”可知这里应为形容词。]