卷子答案网--一个不只有试卷的网站
第一节(共15小题;每小题2分，满分30分) 阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项,并在答题卡上将 该项涂黑。 A There are over 400 units in the National Park System of the United States ，which include National Parks ，National Monuments, National Historic Site and much more. Each of these protects a site of importance, whether it is historic or natural. Crater Lake National Park, Oregon