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.