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。
