Some places are so beautiful or so important in the history of the United States that the na?tional government has set them aside to protect them. They are cared for so that everyone now and in the years to come can enjoy them.

 Ranking at the top of these places are the national parks. There are also historical parks and sites, national monuments, military parks, battlefield sites, national, cemeteries, memorials, parkways, and state parks. All together they make up the national park system of the United States. They are managed by the national park service.

 The oldest of the national parks is Yellowstone. It was made a park in 1872. Now the Unit?ed States has more than 30 national parks. But Yellowstone is still the largest with over two mil?lion acres.

 The government hires many workers to take care of the parks. There are scientists who know a great deal about wildlife. They see to it that the animals of the parks can roam around arid live as they naturally would. There are scientists who know a lot about insects and diseases that might harm the trees and wild flowers. There are scientists who know a great deal about the rocks of the region. There are rangers who see to it that the visitors follow the park rules.

 The national parks are wonderful playgrounds. There are places for campers. And there are cabins to rent and lodges with dining rooms where visitors may stay as they do in a hotel. In ad?dition，there are wonderful opportunities for hiking， taking boat trips， fishing， swimming， ex?ploring the wilderness, and even climbing mountains.

 The parks,however, are more than just interesting and beautiful. They have been called the biggest summer schools in the world. In each park there are scientist guides to explain to the visitors what they are seeing. There are museums, too,with exhibits to show visitors how the regions came to be as they are. Every year millions of visitors go to the national parks. 

(   ) 5. What do we know about Yellowstone according to the passage? 

   A. It covers about three million acres. 

   B.  It is one of those latest national parks.

   C.It belongs to the historical parks and sites.

   D.It is a most important national park in America.

(   ) 6. Rangers are hired in the national parks to        .

   A. watch visitors' behavior in the parks

   B.analyze the rocks in the parks

   C.take care of the forests in the parks

   D.guide visitors around the parks

(   ) 7. Why are the national parks called the biggest summer schools in the world?

   A.Because Visitors can learn the history of the parks.

   B.Because visitors crowd into the parks every summer.

   C.Because visitors can explore the wilderness and take boat trips there.

   D.Because visitors can learn from the scientists in the parks. 

(   ) 8. What is the passage mainly about?

   A.The problems of the national parks.

   B.A brief introduction to the national parks.

   C.Some tips on traveling in the national parks.

   D.A brief introduction to the national park service.

5—8 DADB

5.D從第三段的The oldest of the national parks is Yellowstone和Yellowstone is still the largest with over two million acres這兩句話可知答案選D項(xiàng)。

6.A從第四段的There are rangers who see to it that the visitors follow the park rules可知,護(hù)林員的職責(zé)是監(jiān)督游客是否遵守公園的管理規(guī)定，故選A項(xiàng)。

7.D從最后一段的In each park there are scien?tist guides to explain to the visitors what they are seeing可知，國家公園有很多科學(xué)家在給游客們做解說工作，因此游客們可以學(xué)到很多知識。

8.B本文簡單介紹了美國國家公園的歷史、目前發(fā)展的情況。所以選B項(xiàng)最合適。

題目來源：丟分題高中英語高二上 > Unit 4 Global warming

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