At the C2 level, knowing synonyms is not enough. You need to master in context. The Upstream series is famous for its "Lexical Chunks" sections, which expose students to the way native speakers actually construct sophisticated sentences.
The availability of the "Upstream Proficiency C2 Student's Book" in PDF format would offer digital access to the course materials, providing flexibility for learners to study across various devices. However, the actual availability of specific copyrighted materials in PDF format often depends on publishers' policies and can sometimes be restricted due to copyright laws. upstream proficiency c2 students book pdf
No book is perfect, and the C2 level has specific frustrations. At the C2 level, knowing synonyms is not enough