Cover of the textbook Solutions Upper-Intermediate - Workbook

The key answer of exercise 1

The key to exercise solutions in chapter 5F - Love is in the air for the textbook Solutions Upper-Intermediate - Workbook with authors Tim Falla and Paul A. Davies from Oxford University Press

Question

Complete the sentences with the words below.

Answer

  1. guinea pigs
  2. paper
  3. proof
  4. mate
  5. genes
  6. immune systems
  7. offspring
  8. organs