If your book doesn't have a key, it is likely contained within the Teacher’s Book for that specific series.

The is like a gym mirror. It reflects your current ability, showing you where your form is correct and where you need adjustment. Used passively (just copying), it is worthless. Used actively (attempt, check, analyze, retry), it is priceless.

Finding the specific answer key for a Pre-Intermediate Student's Book depends on which textbook series you are using (e.g., English File ). Most publishers provide these keys within the Teacher's Book or as downloadable PDFs on educational platforms. English File (Oxford University Press)