Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice of an occupation should be made even before choice of a curriculum in high school. 1 ___, most people make several job choices during their working lives, partly because of economic and industrial changes and partly to improve their position. The “one perfect job” does not exist. Young people should therefore enter into a broad flexible training program that will 2 ___ them for a field of work rather than for a single 3 ___.