英语完形填空Those who have a strong love for climbing high and dif

英语完形填空
those who have a strong love for climbing high and difficult mountains are often looked upon with astonishment. why are men and women 16 to suffer cold and hardship, and to 17 on high mountains? this astonishment is caused, probably, by the difference between mountaineering and other forms of activity 18 men give their leisure.
mountaineering is a sport and not a game. there are no man-made rules, as there are for such games as golf and football. there are rules of a different kind which it would be dangerous to 19 , but it is this *** from man-made rules 20 makes mountaineering interesting to many people. those who climb mountains are free to use their own methods.
if we compare mountaineering with other more 21 sports, we might think that one big difference is that mountaineering is not a “team game”. we should not be 22 in this. there are, 23 , no “matches” between “teams” of climbers, but when climbers are on a 24 linked by a rope on which their lives may 25 , there is obviously teamwork.
the mountain climber knows that he may have to fight forces that are stronger and more powerful than man. he has to fight the forces of 26 . this sport requires high physical and mental 27 .
a mountain climber continues to improve in skill year after year. a skier is probably 28 his best by the age of thirty, and most international tennis champions are in their early twenties. but it is not 29 for men of fifty or sixty to climb the highest mountains. they may take more time than younger men but they probably climb with more skill and less 30 of effort. they certainly experience equal enjoyment.
16. a. forbidden b. willing c. reluctant d. forced
17. a. take risks b. take shelter c. make fortunes d. make peace
18. a. in that b. so that c. for which d. to which
19. a. break b. follow c. deal with d. set up
20. a. what b. it c. that d. which
21. a. ignored b. examined c. practiced d. discussed
22. a. misunderstood b. mistaken c. disappointed d. disturbed
23. a. in short b. up to now c. of course d. on one hand
24. a. trip b. cliff c. stage d. step
25. a. depend b. decide c. build d. base
26. a. nature b. universe c. world d. environment
27. a. certainty b. safety c. quantities d. qualities
28. a. off b. after c. behind d. past
29. a. unclear b. unusual c. unlike d. unfair
30. a. storage b. concern c. waste d. usage