75. 答案at the beginning

解析：根据第二段“They usually start out at half the pay of a journeyman，and the pay increases gradually as they move further along in the job and studies.”可判断。

74. 答案theoretical

解析：根据第一段“The rest of the apprentice?s time is spent in a classroom environment learning the theoretical skills the career requires.”可判断。

73. 答案the majority

解析：根据第一段“An apprentice spends the majority of the time in a workplace environment learning the practical skills of a career from a journeyman”可判断。

72. 答案classroom learning[

解析：根据第一段第一句“An apprenticeship is a form of on the job training that combines workplace experience and classroom learning.”可判断。

71. 答案Apprenticeship

解析：全文是围绕“Apprenticeship”而展开描写的，故填Apprenticeship。

79. Results 　　　　　　　　　　　　　　　　　　　 80. another pay increase

77. many well-trained workers. 　　　　　 78. being laid off

75. at the beginning 　　　　　　　　　　　　　 76. a jouneyman’s wages

73. the majority 　　　　　　　　　　　　　　　　 74. theoretical

71. Apprenticeship 　　　　　　　　　　　　　　 72. classroom learning