Language in Use．Pre-intermediate：Classroom book．B Language in Use．Pre-Intermediate：Classroom Book Language in Use．Upper-intermediate：Classroom Book Language in Use．Intermediate：Classroom book．A Language in Use．Intermediate：Classroom book．B Language in Use．Intermediate：Classroom book Language in Use．Pre-Intermediate：Teacher's Book Language in Use．Upper-intermediate：Self-study workbook Language in Use．Pre-Intermediate：Self-study Workbook Language in Use．Intermediate：Teacher's Book