She opened it. It wasn't a textbook. It was a set of 50 exercises, each paired across two columns.
Clear, in-depth explanations of advanced grammar points, often focusing on nuance and context [2].
Emphasis on structures commonly found in Cambridge CAE and CPE exams, such as inversion, cleft sentences, and participle clauses [1]. Key Features of Grammar Lab C1/C2 1. In-Depth Analysis of Complex Structures