These two cassettes accompany the student's book at level one of Interchange, which contains 15 units, each focusing on a practical theme or topic such as occupations and work, travel, shopping and entertainment and supported by grammatical structures, vocabulary, pronunciation and exercises Cassette 1: Units 1-9 Cassette 2: Units 9-15 Общее ожумч время звучания: 2 часа 05 минут Авторы Джек Ричардс Jack C Richards Джонатан Халл Jonathan Hull Сьюзен Проктор Susan Proctor.  UnknownИздательство: Cambridge University Press, 1990 г Коробка ISBN 0 521 35203 7 Язык: Английский.