Official answer keys are generally found in the following resources: Workbook & Audio Activities

Write a three-sentence summary of the text in your own words before looking at the questions. If your summary matches the main idea, you are likely to get the integration questions right.

Compare your answers with a classmate. If you both arrived at different answers, argue your points using evidence from the text. This mimics the "synthesis" required by the curriculum. Conclusion

The "answer key" varies slightly depending on the edition (e.g., 2020, 2023) and the publisher (often Santillana, McGraw-Hill Interamericana, or Edelvives). Below, we provide a based on the most common readings in Units 1-4.