Your body is a fortress under constant assault. Infectious diseases, parasites, environmental toxins, physical trauma, allergens, and natural disasters are some external enemies it faces. From the inside, it is threatened by occasional overzealous allergic, immune, and inflammatory responses, as well as by the cellular mutations that produce cancer.
Cutting Edge Upper-Intermediate Students' Book (3rd Edition)
Cutting Edge Upper-Intermediate Students' Book (3rd edition) builds on the task-based learning approach that has made this course so popular. With fresh, new, integrated dvd material and digital components, learners can be confident of improving their language skills through a carefully balanced range of activities.
Video with video scripts and Audio with audio scripts added Thanks to Eugenius
