Cover of the textbook Solutions Advanced - Workbook

The key answer of exercise 7

The key to exercise solutions in chapter Review Unit 4 for the textbook Solutions Advanced - Workbook with authors Tim Falla and Paul A. Davies from Oxford University Press

Question

Choose the correct words to complete the text.

Answer

  1. be living
  2. have been using
  3. have developed
  4. be doing
  5. be found
  6. have discovered
  7. have changed
  8. be fighting
  9. be

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