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2017年高考英语备考专练（2）---完形填空 第一套 完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的四个选项中选出可以填入空白的最佳选项. On the IraqSyria border，a pack of wild dogs circled American soldiers for food．The leader of the pack was a grayandwhite dog．The soldiers called him Nubs．Nubs was shaking and 36 able to stand．Marine major Brian Dennis looked closer and saw that there was a knife wound 37 his chest． Dennis couldn’t stand seeing the dog 38_．He and his men immediately treated the wound，and gave Nubs medicine．Nubs 39 but was still in pain．The next day，the team had to 40．Ten days later，Dennis’s unit was back，and so was Nubs．He was still 41，but the men fed him and played with him． Before long the unit once again 42 an outpost (前哨) 70 miles away．Nubs，slowly but determinedly，43_them far into the trackless wasteland until the men lost 44_of him．Two days later，beyond Dennis’s 45_，he saw Nubs just outside the outpost．The dog had tracked him across 70 miles of frozen desert to 46 with the friend who had saved his life．From then on Nubs and the men slept in the same place，and ran around in the same ruins． Until an order came down from above that they were not 47__to have pets，Dennis 48 to make sure the dog would continue to live the 49 life．So he quickly raised $4,000 from his family and friends to fly Nubs to50． | 
