White Sands is about twenty four kilometers southeast of the city of Alamogordo, New Mexico. In the visitor center at the entrance of the park, you can find out special activities and guided walks. You can drive about thirteen kilometers into the center of the dunes. It is like driving on a lonely white planet.Along the way there is information that tells about the natural history of White Sands.

　　You can also explore the dunes on foot, seeing some unusual and beautiful plants and flowers. Signs along the trail tell about the plants growing in the sand. You can even camp there overnight. But you must be careful. It is easy to get lost in the waves of moving sand especially during sandstorms. There is no water to drink. The temperature can rise to thirty eight degrees Celsius in summer. There is no shelter from the sun's rays.

　　White Sands is part of America's National Parks System, and it is just one of the unusual examples of America's natural and cultural treasures.

　　语篇解读：美国新墨西哥的白沙是世界自然奇观，以其极端的环境和独特的沙丘吸引着四面八方的游客。

　　1．Which of the following plays a major role in making for the extreme environment?

　　A．Plants and animals.

　　B．Strong winds.

　　C．Intense heat and little rain.

　　D．Many people.

　　解析：细节理解题。根据第三段前三句中的内容可知形成这种极端环境的最主要的因素是酷热和少雨。

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