第六部分：完形填空

　　阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。

　　Underground Coal Fires

　　Coal burning deep underground in China, India and Indonesia is threatening the　environment and human life, scientists have warned. These large scale ______ (51)　blazes (火焰) cause the ground temperature to heat up and kill surrounding vegetation,　produce greenhouse gases and can ______ (52) ignite (点燃) forest fires, a group of　scientists told the annual meeting of the American Association for the Advancement of　Science in Denver . The resulting ______ (53) of poisonous elements like mercury　can also pollute local water sources and soils, they warned.

　　“Coal fires are a global disaster,” said Associate Professor Glenn Stracher of East　Georgia Collage in Swainsboro, USA. But ______ (54) few people know about them.

　　Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to ______ (55) and　under the right combinations of sunlight and oxygen, can trigger spontaneous (自发的)　catching fire and burning . This can occur underground, in coal stockpiles, abandoned　mines or even as coal is transported. ______ (56) fires in China consume up to 200　million tons of coal per year, delegates were told. In ______ (57), the U.S economy　consumes about one billion tons of coal annually, said Stracher, ______ (58)　analysis of the likely impact of coal fires has been accepted for publication in the International Joomal of Acoal Ecology. ______ (59) underway, coal fires can burn for　decades, even centuries. In the process, they release large ______ (60) of　greenhouse gases, poisonous fumes and black particles into the atmosphere.

　　The members of the panel discussed the ______ (61) these fires may be having on global and regional climate change, and agreed that the underground nature of　the fires makes them difficult to ______ (62).

　　Ultimately, the remote sensing and other techniques should allow scientists to　______ (63) how much carbon dioxide these fires are emitting (释放) 。 One suggested ______ (64) of containing the fires was presented by Gary Colaizzi, of　the engineering firm Goodson, which has developed a heat-resistant grout (灌浆)，which　is designed to be pumped into the coal fire to ______ (65) the oxygen supply.

　　51. A. house B. underground C. sky D. water

　　52. A. only B. even C. just D. then

　　53. A. release B. paste C. consumption D. elimination

　　54. A. happily B. traditionally C. surprisingly D. fashionably

　　55. A. exchange B. regenerate C. disappear D. transfer

　　56. A. Most B. Such C. Some D. Many

　　57. A. comparison B. case C. time D. turn

　　58. A. which B. who C. whose D. what

　　59. A. Yet B. Unless C. Although D. Once

　　60. A. data B. volumes C. figures D. images

　　61. A. attack B. impact C. identification D. implication

　　62. A. develop B. relieve C. detect D. supply

　　63. A. estimate B. experiment C. gather D. illustrate

　　64. A. cause B. method C. treatment D. rule

　　65. A. take up B. back up C. run out D. cut off

　　答案：

　　51-55：BBACC

　　56-60：BACDB

　　61-65：BCABD