Most free PDFs do not include the audio tracks (the 40+ listening exercises). Without audio, the learner misses intonation, liaison, connected speech, and listening comprehension training – which are central to communication.
Be very careful with random websites offering a "free PDF." Many contain malware, outdated files (missing the audio), or incomplete scanned pages with poor resolution. Your progress is worth more than a virus. Most free PDFs do not include the audio
Before you rush to download the , confirm your level. the learner misses intonation