第一节(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A、B、C和D四个选项中,选出可以填入空白处的最佳选项。主题语境:人与自然害纺范 The tornado siren(龙卷风警报器) sounded at the Little Sioux Scoad(童 Ranch in western lowa just before the power went out on June 11. 2008 Scout Leader Fred Ullrich 16 the door of the building where he and 65 boy scouts had taken shelter, "I was 17 lightning and listening for the tornado sound, but there was 18 like that"Ullrich says. "But knew we were in 19. I asked the boys to get under the tables. "As the scouts ran for 20,the wind came up. Ullrich tried to come in and push the door shut, but 21 he was picked up and thrown from the 22. Then the wind blew the boy scout shelter apart "I can only describe my actions at that moment as being 23." Ullrich says. "There was nothing I could do Once the tornado 24, Ullrich noticed that all around him was a mess. Some scouts were covered hy the debris {. ) For a short moment Ullrich didn't 25 what to do. Then he took action. He 26 the able-bodied to look after the injured, Ullrich was trained in first aid, skills that 27 helped the scouts that day. But before any of that formal training would even 28, Ullrich needed another important skill: to get hold of himself and get people29 When tescue workers arrived, what they saw was 30 -four scouts were dead or seriously wounded Yet, amazingly, they also that Ullrich and the uninjured scouts were putting their training to work. They had 32 the most seriously injured for their journey to the hospital.