第5部分：补全短文(第46～50题，每题2分，共10分)
下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。
Sleeping Giant
Right now, an eruption is brewing in Yellowstone National Park. Sometime during the next two hours, the park’s most famous geyser, Old Faithful, will begin gurgling boiling water and steam. 46
Old Faithful is not only a spectacular sight; it’s also a constant reminder that Yellowstone sits on one of the largest volcanoes in the world. If you’ve never heard of Yellowstone’s volcano, you’re not alone. 47 Yet it has erupted three times during the last 2 million years. And one of those eruptions spewed enough volcanic ash and other debris to blanket half the United States.
Yellowstone’s volcano is sometimes called a “supervolcano,” or extremely large and explosive caldera volcano. 48 This supervolcano formed over a hot spot, an extremely hot area in Earth’s mantle. John Valley, a volcano professor, said that as the crust moves across a hot spot, the hot spot melts a section of the plate moving over it, forming “one volcano after another.”
The Yellowstone hot spot melts thick continental crust, which may cause catastrophic eruptions. According to experts the eruptions that created each of the three calderas in and around Yellowstone National Park were larger than any other volcanic eruption in recorded history. The most recent eruption, which happened 640, 000 years ago, produced at least 1,000 cubic kilometers of ash and debris, which blanketed most of the western half of the United States. 49
Geological evidence shows Yellowstone has blown its stack every 700,000 years or so. “If nature were truly that regular and reliable, we would be due for another eruption soon,2” said Valley. “However, these processes are subject to variability, so we don’t really know when the next eruption will happen.”
50 It is the volcanic energy that powers the geysers and hot springs, creates the mountains and canyons, and generates the unique ecosystems that support Yellow tone’s diverse wildlife.
A. Three calderas make up more than a third of Yellowstone National Park.
B. The first Yellowstone eruption, 2 million years ago, released more than double that amount of ash and debris.
C. The volcano is so inconspicuous (不显眼的 ) that few people know it exists.
D. Then, an enormous fountain will shoot high into the air.
E. While the active geological processes at Yellowstone do pose some risk to the public, they also make it a unique treasure.
F. Yellowstone National Park attracts the interest of geologists the world over.
第6部分：完形填空(第51～65题，每题1分，共15分)
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
Animal’s “Sixth Sense”
A tsunami was triggered by an earthquake in the Indian Ocean in December, 2004. It killed tens of thousands of people in Asia and East Africa. Wild animals, 51 , seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that1 they possess a “sixth sense” for 52 , experts said.
Sri Lankan wildlife officials have said the giant waves that killed over 24, 000 people along the Indian Ocean island’s coast clearly 53 wild beasts, with no dead animals found.
“No elephants arc dead, not 54 a dead rabbit. I think animals can 55 disaster. They have a sixth sense. They know when things are happening,” H. D. Ratnayake, deputy director of Sri Lanka’s Wildlife Department, said about one month after the tsunami attack. The 56 washed floodwaters up to 2 miles inland at Yala National Park in the ravaged southeast, Sri Lanka’s biggest wildlife 57 and home to hundreds of wild elephants and several leopards.
“There has been a lot of 58 evidence about dogs barking or birds migrating before volcanic eruptions or earthquakes. But it has not been proven,” said Matthew van Lierop, an animal behavior 59 at Johannesburg Zoo.
“There have been no 60 studies because you can’t really test it in a lab or field setting,” he told Reuters. Other authorities concurred with this 61 .
“Wildlife seem to be able to pick up certain 62 , especially birds … there are many reports of birds detecting impending disasters,” said Clive Walker, who has written several books on African wildlife.
Animals 63 rely on the known senses such as smell or hearing to avoid danger slid as predators.
The notion of an animal “sixth sense” — or 64 other mythical power is an enduring one which the evidence on Sri Lanka’s ravaged coast is likely to add to.
The Romans saw owls 65 omens of impending disaster and many ancient cultures viewed elephants as sacred animals endowed with special power or attributes.
51. A. therefore B. however C. although D. whatever
52. A. shelters B. foods C. disasters D. water
53. A. missed B. protected C. raised D. caught
54. A. such B. too C. so D. even
55. A. feel B. see C. hear D. sense
56. A. waves B. tides C. winds D. rivers
57. A. birthplaces B. playground C. reserve D. storage
58. A. experimental B. apparent C. scientific D. chemical
59. A. specialist B. assistant C. supporter D. sponsor
60. A. additional B. specific C. especial D. exceptional
61. A. modification B. detection C. assessment D. value
62. A. route B. behavior C. principle D. phenomenon
63. A. unwillingly B. occasionally C. doubtfully D. certainly
64. A. some B. much C. many D. few
65. A. on B. as C. for D. in
