For students using the third edition, comprehensive unit-by-unit answers are available online.
While using GDZ, keep in mind the requirements for the for 7th grade: skachat gdz k rabochei tetradi po angliiskomu iazyku 7 klass
Depending on which curriculum you use, here are the primary resources for downloading or viewing answers online: Popular Curriculums and Resources For students using the third edition
A full homework guide (PDF) is available which covers both the textbook and workbook exercises. skachat gdz k rabochei tetradi po angliiskomu iazyku 7 klass