答案:
1.created some of these dunes in ancient times.
2.plant life in the rich forests of oak and maple.
3.Supervision by these agencies guarantees that the land will always belong to the public.
4.natural gas company also operate along the lake.
5.bill providing tax money to buy property along the lake from its private文本:
This is Faith Lapidus.
And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we visit the Indiana Dunes. These hills of sand are near Chicago, Illinois. They rise on the shores of Lake Michigan, one of America's five Great Lakes.
More than two million people visit the sand hills in the middle-western state of Indiana each year. The winds along Lake Michigan created some of these dunes in ancient times. Other dunes may be building right now. The winds create dunes when they drop loose sand onto land. Some dunes look partly round. Others take the form of long, narrow hills.
Visitors from all over the world explore the area near the Indiana Dunes. They swim and sail on the lake. They watch birds in the wetlands. They study plant life in the rich forests of oak and maple trees. The smooth sands of the dunes and lakeshore make a clear musical sound when people walk on them. Some of these sounds can be heard ten meters away. Visitors often say that the sand dunes "sing."
The Indiana state government and the federal government control more than six thousand hectares of land along the lake. They operate parks with visitors' areas and scientific research stations. Supervision by these agencies guarantees that the land will always belong to the public. Laws protect the plants, animals, and natural and historical points of interest.
During the twentieth century, many people worked hard to save the dunes from development for industrial and port uses. This was not easy. The land along that area of Lake Michigan is extremely valuable. Some of the land provides important lake ports. Industries and Indiana's natural gas company also operate along the lake.
In the early nineteen fifties, some companies were removing five tons of sand each day from the dunes. Scientists of the Indiana Geological Survey investigated the sand supply in nineteen fifty-two. They said that the dunes would be gone in fifty to one hundred years if companies continued to remove sand at that rate. The wind and waves of Lake Michigan created the dunes over thousands of years. Yet people could destroy the dunes in a lifetime.
The federal government established the National Park Service in nineteen sixteen. A Chicago businessman named Stephen Mather was its first director. Mister Mather created many national parks. He wanted the Indiana dunes to be a national park, too. However, the United States had entered World War One in nineteen seventeen. Congress was not thinking about creating parks. It was thinking about soldiers and military supplies.
Public support for a protected dunes park continued to grow, however. In nineteen twenty-three, Indiana passed a bill providing tax money to buy property along the lake from its private owners. In nineteen twenty-six, the Indiana Dunes State Park opened. It contained more than eight hundred hectares of land
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[此贴子已经被作者于2008-5-13 19:40:52编辑过]