本文讲述了Bell作为搜救志愿者的经历。
16.C 细节理解题。由最后一段The experience inspired her to devote her life to helping others.She remains a search-and-rescue volunteer and plans to study nursing in college.可知C是错误的。
17.C 推理判断题。由第三段第一句可推出答案。
18.B e不属于志愿者搜救的范围,所以排除A、C、D三项。
19.C 细节理解题。由第三段倒数第二句They learned how to perform the basics:tying knots,reading maps and giving medical aid.可知C正确。
20.C 推理判断题。A项与问题无关;B选项太绝对;D未谈及。可知C正确。