The puzzles for upper-intermediate learners at Level 4 on this page are designed to refine your skills and fully consolidate your knowledge at the B2 level. At this stage, you’ll encounter the most complex grammar and vocabulary for upper-intermediate learners, along with challenging tasks that mirror real-world scenarios and professional contexts. Based on the CEFR framework, these activities require you to apply critical thinking and demonstrate fluency in handling advanced written texts and language functions. Completing Level 4 puzzles means you have mastered all the necessary elements of B2 proficiency, equipping you to confidently move forward to the advanced stages of English learning.