Backpack (4) 2/e Workbook with Audio CD/1片

New Features:

　　* All New music engages students with a catchy , pop sound

　　* New values curriculum provides character education

　　*New Picture Dictionary ( Starter), Sound and Spelling Handbooks (Levels 1-3) and Grammar and Writing Handbooks (Levels 4-6) in the SB and WB provide support and practice.

　　*New Assessment Package offers teaching tips, techniques, tests, and a test generator