8. In order to

7. in pain

6. take one’s advice

5. give up 　

4. become addicted to

3. has been broken into

2. make a plan

1. in order to

　　　 Rivers are one of our most important natural resources. Many of the world’s great cities are located on rivers, and almost ___1____ country has at least one river flowing through it ____2____ plays an important part in the lives of its people.

　 Since the beginning of history, people ____3____ (use) rivers for transportation. The ____4____ (long) one in the United States is the Mississippi, and the lifeline of Egypt is the Nile. ____5___ transportation, rivers give water to drink, water for crops, and chances for fun and recreation for the people ____6___ live along their banks.

　 ____7_____, large cities and industries ____8____ are located on rivers often make problems. ____9____ the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the ____10____ (important) of doing more to keep their rivers clean if they want to enjoy the benefits of this 　natural resource.