题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式

Rivers are one of our most important natural resources. Many of the world’s great cities are located on rivers and almost every country has at least one river 1. (flow) through it, which plays an important part in the lives of 2. (it) people.

Since the beginning of history, people 3. (use) rivers for transportation. The Yellow River and Changliang River play a large role in China. The Mississippi, the 4. (long) one in the United States ever influenced the American people 5. (great) in history. The lifeline of Egypt is the Nile. Rivers provide fresh water 6. drink, grow crops, make electricity and chances to have fun for those 7. live along their banks.

8. the cities grow in size and industries increase in number, the river water is severely being polluted. It urges all countries to make 9. (decide) and take immediate action to stop it from 10. (pollute) any more.