Cover of the textbook Performer B1, Vol. 2

The key answer of exercise 4

The key to exercise solutions in chapter Review Units 3-4 for the textbook Performer B1, Vol. 2 with authors Marina Spiazzi, Marina Tavella e Margaret Layton from Zanichelli

Question

Choose the correct alternative.

Answer

  1. have you had; Since
  2. has replaced
  3. has been working; since
  4. have known; for
  5. have you surfed
  6. have you been waiting; have been trying
  7. have been studying