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Modern zoos are different from ¡¡41¡¡ ¡¡built fifty years ago. At that time zoos were ¡¡42¡¡ ¡¡where people could go to ¡¡43¡¡ ¡¡animals from different parts of the world. The animals lived in cages with iron bars. Although the zoo ¡¡44¡¡ ¡¡took good care ¡¡¡¡45¡¡ ¡¡them, many of the animals didn¡¯t feel ¡¡46¡¡ ¡¡, and they often fell ill.

In modern zoos, people can see animals in more ¡¡47¡¡ ¡¡condition. The animals are given more ¡¡48¡¡ ¡¡in larger places ¡¡49¡¡ ¡¡they can live almost as comfortably as they would in nature. ¡¡50¡¡ ¡¡the appearance of zoos has changed. Tress and grass grow in cages, and water ¡¡51¡¡ ¡¡through the places the animals ¡¡¡¡52¡¡ . There are few bars; ¡¡53¡¡ , there is often a deep ditch, ¡¡54¡¡ ¡¡with water, ¡¡¡¡55¡¡ ¡¡surrounds a space where several sorts of animals live together as if in the wild. In an American zoo, visitors can walk through a huge special cage that is filled with trees, some more animals and many birds, and large enough for the birds to live ¡¡56¡¡ . In a zoo in New York, with the ¡¡57¡¡ ¡¡of special night light, people can ___58¡¡ ¡¡certain animals that are ¡¡59¡¡ ¡¡only at night, when most zoos are closed. Some zoos have special places for visitors to watch animals that live in the desert or ¡¡60¡¡ ¡¡water.

41. A. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. those¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. which¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. what

42. A. pools¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. palaces ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. rooms¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. places

43. A. watch¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. look at ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. check ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. notice

44. A. leaders¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. visitors¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. keepers¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. persons

45. A. for¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. of ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. at

46. A. happily ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. relaxing¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. comfortable¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. uncomfortable

47. A. natural¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. beautiful ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. safe¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. sunny

48. A. right ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. relax ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. freedom ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. free

49. A. until ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. so that ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. when ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. such that

50. A. Even as ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. Even though ¡¡¡¡¡¡¡¡¡¡ C. Even ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. Even if

51. A. flows ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. blows¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. digs¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. jumps

52. A. run ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. lie ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. live¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. live in

53. A. instead¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. instead of ¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. but ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. though

54. A. to fill ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. filling ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. filled ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. full

55. A. what¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. which ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. that ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. where

56. A. clearly¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. easily¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. brightly¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. naturally

57. A. arrangement ¡¡¡¡¡¡¡¡¡¡¡¡ B. use¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. surrounding ¡¡¡¡¡¡¡¡¡¡¡¡ D. plan

58. A. study ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. learn ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. observe ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. look

59. A. passive¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. active¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. pretty ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. brave

60. A. from¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. at ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. under¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. in

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