根据下列各句句意及所给单词的首字母或汉语提示，写出所缺单词的正确形式（请在答案卷上写出完整的单词）。

66. The Big Bang Theory is an American TV s___________.

67. While she was studying in university, she did lots of v___________ work for the local Red Cross without getting paid.

68. Recently, we did a s___________ in several schools to know about teenagers’ lifestyle.

69. I was well prepared, so I felt r__________ and confident before the match.

70. Don’t ask me anything about IT. I am no e__________ at it.

71. Although he has never been trained __________（正式）as a teacher, he is well received by his students.

72. The program is __________（设计）to help people who have been out of work for a long time.

73. Life there will be very hard, ___________（尤其）for the only child in a family.

74. You can reduce your stress by ____________ （组织）your work and time better.

75. The report ___________（预测）that prices will rise by 3%.