北京大学2012年考博英语真题

　　Part Three Cloze Test (15%)

　　Directions: Read the following passage carefully and choose ONE best word for each numbered blank. Mark you answers on the ANSWER SHEET.

　　The world’s greatest snow-capped peaks, which run in a chain from the Himalayas to Tian Shan 26 the border of China and Kyrgyzstan, have lost no ice 27 the last decade, new research shows. The discovery has stunned scientists, who 28 that around 50bn tons of meltwater 29 each

　　year and not being replaced by new snowfall.

　　The study is the first to survey all the world’s icecaps and glaciers and was made 30 by the use of satellite data. Overall, the contribution of melting ice outside the two largest caps 一 Greenland and Antarctica — is much 31 than previously estimated，with the lack of ice loss in the Himalayas and the other high peaks of Asia 32 most of the discrepancy.

　　Bristol University glaciologist Prof Jonathan Bamber, who was not part of the research team, said, “The very unexpected result was the negligible mass loss from high mountain Asia, which is not 33 different from zero. ”The melting of Himalayan glaciers caused 34 in 2009 when a report from the UN’s intergovernmental Panel on Climate Change mistakenly stated that they would disappear by 2035, instead of 2350. 35 ，the scientist who led the new work is clear that while greater uncertainty has been discovered in Asia’s highest mountains, the melting of ice caps and glaciers around the world 36 a serious concern.

　　“ Our results and those of everyone else show we are losing a huge amount of water into the oceans every year,” said Prof John Wahr of the University of Colorado. “People should be just as worried about the melting of the world’s ice as they were before. ” His team’s study, published in the journal Nature, concludes that between 443-629bn tons of meltwater overall are added to the world’s oceans each year. This is 37 sea level by about 1. 5mm a year, the team reports, 38 the 2mm a year caused by expansion of the warming ocean.

　　The scientists are careful to point out that lower-altitude glaciers in the Asian mountain ranges 一 sometimes dubbed the “third pole” 一 are 39 melting. Satellite images and reports confirm this. But over the study period from 2003-10 enough ice was added to the peaks to 40 •

　　26. A. on B. in C. across D. over

　　27. A. from B. as C. upon D. over

　　28. A. believed B. had believed C. have believed D. were believing

　　29. A. were being shedding B. were shedding C. were being shed D. were shed

　　30. A. impossible B. possible C. unavailable D. available

　　31. A. shorter B. smaller C. fewer D. less

　　32. A. in charge of B. responsible for C. liable for D. caused by

　　33. A. significantly B. meaningfully C. informatively D. expressively

　　34. A. agreement B. consensus C. controversy D. difference

　　35. A. Besides B. Furthermore C. Despite D. However

　　36. A. resumes B. remains C. keeps D. lasts

　　37. A. rising B. arising C. raising D. rearing

　　38. A. including B. adding up to C. additionally D. in addition to

　　39. A. definitely B. necessarily C. exactly D. particularly

　　40. A. replace B. refund C. compensate D. balance

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