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Here are the answers to the given questions: 25. ventilation 26. milestone 27. (Not flip. Perhaps) a glimmer of amusement 28. Not facies. Perhaps, what you see is rather superficial. 29. counterclockwise 30. behavior ( Reta is studying animal behavior) 31. Not STWW, perhaps a stowaway 32. Not ST0W, perhaps bestowed 33. pinpointed 34. (Not ship.) Perhaps, shipped. 35. Not ship, perhaps shipboard doesn't fit the description. Perhaps epic 36. misalignment 37. citadel 38. Not COMMUNICATE. Perhaps removed, or perhaps excluded. 39. Not KNEE. Perhaps, jumpy. 40. Not NEGATE. Perhaps, disclaimed 41. Not VAIN. Perhaps, arrogant 42. exemplar 43. Not CHRONOLOGY. Perhaps overdue, or perhaps belated. 44. Not MASH. Perhaps, mishmash. 45. Not MUSE. Perhaps, shocked. 46. impractical 47. (Not SCIENCE.) Perhaps, pulp 48. Not WORD. Perhaps reflection, or perhaps an embodiment 49. Not GERM. Perhaps, blooms 50. Indeed, in today's world, people have got to get along in order to evolve