UNIT 9. UNDERSEA WORLDPART 1. L.D 2. C 3. B 4. A 5. CPART 2. 6. A 7. C...

51. B 52. A 53. D 54. C 55. D 56. C 57. D 58. B 59. C 60. D

Part 5. 61. A 62. D 63. B 64. A 65. C 66. B 67. A 68. D 69. C 70. B