38. To protect animals, zoos
A.are trying to keep all kinds of animals
B. are trying to free the animals
C.teach people more about animals
D. want people to feed the animals
37. Today, zoos keep animals
A. in bigger cages B. in the wild
C. in smaller cages D. in the field
36. Zoos kept animals in small cages so that people can
A. protect them B. see them better C. feed them D. save them
34. A. take B. spend C. cover D. cost
33. A. lower B. higher C. worse D. better
32. A. short B. small C. tall D. fat
31. A. way B. means C. manners D. spirit
30. A. success B. happiness C. failure D. height
29. A. experiences B. difficulties C. fears D. problems
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