——Interchange Student's Book 2 with Audio CD(Interchange Third Edition)
(Paperback)by Jack C. Richards, Jonathan Hull, Susan Proctor Cambridge University Press
(ISBN-13:9780521601948)ISBN-10:0521601940
——Grammar Practice for Pre-Intermediate Students, with key, 3rd Edition
By Vicki Anderson, Gill Holley, and Rob Metcalf. Pearson Education Ltd
(ISBN-978-1-4058-5296-8)