Cambridge English: A2 Key (KET) is our entry-level Cambridge English program. It's designed to improve your ability to communicate in English - in simple, everyday situations. It covers the core English skills of listening, reading, writing and speaking. Choose Cambridge English: A2 Key (KET) if you: Have pre-intermediate English skills, Are looking for a more intensive alternative to General English, and Want a globally-recognised measure of English proficiency for employment, immigration or tertiary study purposes.