I can see three Cambridge English grammar books in the image:
1.
Advanced Grammar in Use (green cover) - for advanced learners
2.
English Grammar in Use (blue cover) - Fifth Edition, for intermediate learners
3.
Essential Grammar in Use (red cover) - Fourth Edition, for elementary learners
All three are by Raymond Murphy and include answers, eBooks, and audio.
However, I don't see a specific homework question or task in this image. The image just shows these three grammar textbooks.
Could you please clarify what specific question or problem you need help with? Are you asking about:
- Which book to choose for your level?
- A specific grammar exercise from one of these books?
- Something else related to these textbooks?
Please provide the actual homework question you'd like me to solve!
Parent Tip: Review the logic above to help your child master the concept of free grammar books.