Visitors to the zoo usually pity the animals owing to their particular emotional associations(联想). Which animals should be indeed pitied?The first type are those clever and __56__ developed animals __57__ lively intelce and desire for activity can __58__ no outlet behind the bars of the cage. Those animals living in a free state before __59__ in the zoo have a strong desire for moving about __60__ , but have to turnaround repeatedly in their quarters. Owing to this disappointment, foxed and wolves __61__ in places which are far too small, are among the most __62__ of all zoo animals.Another sad scene, seldom __63__ by ordinary zoo visitors, is the ____ flying trials of swans (天鹅 ) at migration (迁徙 ) time. These creatures, like most other water birds, are generally made unable to fly by the __65__ of cutting off a tip of the wing bone. __66__ such swans in the zoo generally seem happy under __67__ care and they raise their young without any trouble, at migration time things become __68__ . The birds never really __69__ that they can no longer fly, and repeatedly swim to the __70__ of the pond so that they can have the whole extent of its suce when trying to __71__ against the wind. Meanwhile, their loud flying calls can be heard as they try to __72__ , and again and again the grand preparations end in __73__ .I do not like seeing those __74__ water birds in the zoo. The missing tip of one wing and the still sadder picture that the bird makes when it __75 __ its wings hurt me badly. What a truly sorry picture it is.74. 74 A upright B powerful C valuable D unlucky