第5部分：補全短文(第46～50題，每題2分，共10分)
　　閱讀下面的短文，文章中有5處空白，文章后面有6組文字，請根據(jù)文章的內(nèi)容選擇5組文字，將其分別放回文章原有位置，以恢復(fù)文章原貌。請將答案涂在答題卡相應(yīng)的位置上。
　　Mt. Desert Island
　　The coast of the State of Maine is one of the most irregular in the world. A straight line running from the southernmost coastal city to the northernmost coastal city would measure about 225 miles. If you followed the coastline between these points, you would travel more than ten times as far. This irregularity is the result of what is called a drowned coastline____(46). At that time, the whole area that is now Maine was part of a mountain range that towered above the sea. As the glacier (冰川) descended, however, it expended enormous force on those mountains, and they sank into the sea.
　　As the mountains sank, ocean water charged over the lowest parts of the remaining land, forming a series of twisting inlets and lagoons (咸水湖). The highest parts of the former mountain range, nearest the shore, remained as islands. ____(47) Marine fossils found here were 225 feet above sea level, indicating the level of the shoreline prior to the glacier.
　　The 2,500-mile-long rocky coastline of Marine keeps watch over nearly two thousand islands. Many of these islands are tiny and uninhabited, but many are home to thriving communities. Mt. Desert Island is one of the largest, most beautiful of the Maine coast islands. Measuring 16 miles by 12 miles. Mt. Desert was essentially formed as two distinct islands, _____(48)
　　For years, Mt. Desert island, particularly its major settlement, Bar Harbor, afforded summer home for the wealthy. Recently though, Bar Harbor has become a rapidly growing arts community as well. But, the best part of the island is the unspoiled forest land known as Acadia National Park. Because the island sits on the boundary line between the temperate (溫帶) and sub-Arctic zones, the islands supports the plants and animals of both zones as well as beach, inland, and alpine (高山的) plants.____(49). The establishment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all people, not just the wealthy. Visitors to Acadia may receive nature instruction from the park naturalists as well as enjoy camping, cycling, and boating. Or they may choose to spend time at the archeological museum, learning about the Stone Age inhabitants of the island.
　　The best view on Mt. Desert Island is from the top of Cadillac Mountain. ____(50) From the summit, you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty created by a retreating glacier.
　　A It also lies in a major bird migration
　　B Mt. Desert Island is one of the
　　C The wealthy residents of Mt.
　　D The term comes from the activity
　　E This mountain rises 1,532 feet.
　　F It is split almost in half by Some