When Charlie reached 13 years old, his father David introduced him to rock climbing. One day they 1 to set out for the wild Bighorn Crags and filled their packs with enough supplies to last two weeks. 2 during the second week, David had an accident and broke several bones.
Charlie 3 his father down to the base of the cliff(悬崖).It was dusk and David was shaking with cold and exhaustion. Charlie returned to their campsite, more than a mile down a steep slop (斜坡), and 4 sleeping bags, warm clothes and energy bars. Worried that David would die if he fell asleep, Charlie kept the 5 going; they talked about past travels, the stars overhead and the accident. 6 Charlie allowed himself a very short 7 checking on his father each time he awoke.
When the sun rose, Charlie was 8 to see that his father was awake. They started down the slope and 9their campsite around 4 p.m. David 10 Charlie to look for help the next morning. Charlie burst into tears, but he knew he didn't have a 11 Just after dawn, Charlie headed toward the volunteers' house, determined to bring back a 12 that would carry his father to safety.
Charlie's 13 was 12 miles away, where people had a two-way radio, which could be 14 to call for help. On his way, Charlie 15 voices in the distance. He blew his whistle and called out, and the voices 16.Following his ears, Charlie 17 some people. Hearing the 18 in Charlie's voice, one man offered to run to the volunteers' house and Charlie followed him.
Sometime that evening, David awoke at a hospital, with Charlie at his 19 Father and son hugged. Charlie had kept his 20 He brought back a helicopter.
