It was one of the greatest trips of discovery in the history of America. Never before had any white men travelled to that area. The trip was far more dangerous than expected. The rivers were filled with rocky areas and waterfalls. Sometimes, the boats overturned or broke into pieces against big rocks. All along the way, Powell measured distances, temperatures, heights, depths and currents. He examined soils, rocks and plant life. Powell’s explorations led to the creation of the US Geological Survey, which became responsible for all mapping and scientific programs of American lands.

　　Powell’s scientific studies of western lands shaped his ideas of how those lands should be used. He suggested programs to control both crop farming and cattle raising. He was especially concerned about water supplies. Many of his ideas were rejected at first and were not signed into law until years after his death because they were far ahead of his time. (373W)

　　1. Who do you think had a major influence on John Wesley Powell’s life?

　　A. His mother.

　　B. George Crookham.

　　C. His father.

　　D. The teachers in Harvard and Yale.

　　2. John argued with his father because　.

　　A. his father refused him to leave home

　　B. he wanted to go to college

　　C. his father wanted him to study religion

　　D. he wanted to work instead of studying

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