To explorers like Louis and Clark, the first white people to cross the vast North American continent, the boundless wilderness must have seemed infinite. Yet today, a few hunred years later, much of that wilderness has been paved for parking lots. Taming the wilderness has not, however, tamed the human desire to be out and about in nature. In fact, ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿. The National Park Service has been entrusted with preseving America's last remaining wilderness areas. The job is an increasingly difficult one. The great crowds of people who "get back to nature" are eroding trails, threatening delicate plants, and disturbing the normal routine of wild animals. ① that desire has intensified ② mature is indeed our real friend ③ wilderness, wilderness, everywhere ④ wild animals, not explores, are responsible ⑤ we shoud use the nature in a peaceful way   그럼 천천히~