New Interchange is a multi-level series for adult and young-adult learners of English from the beginning to the high-intermediate level. The Student's Audio Cassette B includes all the recorded material from the Class Audio Program, with the exception of the Listening Activities, for units 9-16 of the Student's Book. The Student's Audio program is also available on Audio CD. (Note that the Student's Audio Program is included in the Student's Book/Audio CD Bundle.)