The answer key shows the correct answer, but you must write the logic.
After finishing an exercise, do not open the answer key immediately. Wait 1 hour (or overnight). Then, without looking at your original answers, retake the 5 hardest questions. Often, your "second guess" is your best guess. Then compare both attempts to the answer key. expert ielts 75 coursebook answer key pdf work
Solution: The official answer key usually references a page number for the listening script (e.g., “See page 178”). If your PDF is incomplete, you cannot verify listening gaps. In this case, consider buying a second-hand physical copy of the coursebook itself—not just the key. The listening scripts are invaluable. The answer key shows the correct answer, but