SCIENCE AND TECHNOLOGY
1. when – had started
2. started/ had started
3. to know – had worked
IX. 58. T 59. F 60. T
61. T
62. F
63. T
64. F
65. T
1. when – had started
2. started/ had started
3. to know – had worked
IX. 58. T 59. F 60. T
61. T
62. F
63. T
64. F
65. T