27. D) He holds a master's degree in criminology.
28. B) To get police officers closer to the local people.
29. C) Effective.
30. B) There are numerous languages in existence.
31. C) It is something we are born with.
32. D) How children learn to use language.
33. B) She was an engineer.
34. C) Adjusting them to different audiences.
35. A) Whether spacemen carry weapons.