Simon _3__ alone, he would probably get back _4__. But Simon decided to risk his __5__ and try to lower Joe down the mountain on a rope（绳）.

　　As they __6__ down, the weather got worse. Then another __7___ occurred. They couldn't see or hear each other and, __8__, Simon lowered his friend over the edge of a precipice（峭壁）. It was ___9__ for Joe to climb back or for Simon to pull him up. Joe's _10__ was pulling Simon slowly towards the precipice. __11__, after more than an hour in the dark and the icy cold, Simon had to __12___. In tears, he cut the rope. Joe __13___ into a large crevasse（裂缝）in the ice below. He had no food or water and he was in terrible pain. He couldn't walk, but he __14__ to get out of the crevasse and started to __15__ towards their camp, nearly ten kilometers __16___.

　　Simon had _17__ the camp at the foot of the mountain. He thought that Joe must be __18__, but he didn't want to leave __19__. Three days later, in the middle of the night, he heard Joe's voice. He couldn't __20__ it. Joe was there, a few meters from their tent, still alive.

1. A. hurriedly B. carefully .C. successfully D. early

2. A. difficult B. similar C. special D. normal

3. A. climbed B. worked C. rested . D. continued

4. A. unwillingly B. safely C. slowly D. regretfully

5. A. fortune B. time C. health D. life

6. A. lay B. settled C. went D. looked

7. A. damage B. storm C. change D. trouble

8. A. by mistake B. by chance C. by chance D. by luck

9. A. unnecessary B. practical C. important D. impossible

10. A. height B. weight C. strength .D. equipment

11. A. Finally B. Patiently .C. Surely D. Quickly

12. A. stand back B. take a rest C. make a decision .D. hold on

13. A. jumped B. fell C. escaped D. backed

14. A. managed B. planned C. waited D. hoped

15. A. run B. skate C. move D. march

16. A. around B. away C. above D. along