Oxford Academic Vocabulary Practice Upper Intermediate B2-C1 with Key

The academic vocabulary covered by the series is sourced from the Academic Word List, and the Oxford Corpus of Academic English. The Corpus is an 85-million-word corpus of academic sources, developed by Oxford University Press, the world's authority on the English language. The Corpus shows how words are used across the four main subject areas of physical sciences, life sciences, social sciences, and humanities.