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61.第二节（共10小题；每小题1.5分，满分15分）
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
The polar bear is found in the Arctic Circle and some bigland masses as far south as Newfoundland While they are rare north of 88°, thereis evidence 61 theyrange all the way across the Arctic, and as far south as James Bay in Canada Itis difficult to figure out a global population of polar bears as much of the rangehas been 62 (poor) studied; however, biologists calculatethat there are about 20,000-25,000 polar bears worldwide Modern methods 63 tracking polar bear populations have been employedonly since the mid-1980s, and are expensive 64 (perform) consistently over a large are（A） In recentyears some Inuit people in Nunavut 65 (report) increases in bear sightings aroundhuman settlements, leading to a 66 (believe) that populations are increasing. Scientistshave responded by 67 (note) that hungry bears may be congregating(聚集)around human settlements, leading to the illusion(错觉) thatpopulations are 68 (high) than they actually ar（E） Of 69 nineteenrecognized polar bear subpopulations, three are declining, six 70 (be) stable, one is increasing, and nine lackenough dat（A）
正确答案
61. that 62. poorly 63. of/for 64. to perform 65. have reported 66. belief 67. noting 68. higher 69. the 70. are
61. that 62. poorly 63. of/for 64. to perform 65. have reported 66. belief 67. noting 68. higher 69. the 70. are
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