根据下列句子所给的汉语注释及句意，写出空缺处单词的正确形式．每空一词．

63.1t's hard to________（想象）how you worked out the problem in such a short time.

64. He has just graduated from university, so he has no________（经验）in teaching.

65. China is trying her best to develop agriculture and________（工业）．

66. He was charged with________（扰乱）the public peace.

67. They were________（宣布）the result of the competition at this time yesterday.

68. He rushed out________（立刻）when he heard the bad news.

69.1 have no idea________（是否）I should take his advice or not.

70. These suggestions would be very________（珍贵）,I think.

71. The plane met with a thunderstorm during the flight, but finally landed in________（安全）

72. Don't touch the camera. It's one of the greatest________（科学家）．

73. Many people believe________（机器人）will do most of our work in the future.

74. Tell your cousin that it is important to leave you________（单独）so you can study.