Many English centers use this course. Ask if you can photocopy the answer key section (for personal use only). Never buy “unofficial” keys from unknown websites—they are full of errors.
For reading errors, the answer key’s explanation is gold. Example: pass the toeic test intermediate course answer key
Many editions include the answer key in the final pages. Check pages 200–240. Look for “Answer Key,” “Tapescripts,” or “Answer Explanations.” Many English centers use this course
An answer key for this unit typically includes: pass the toeic test intermediate course answer key