Ответ:

Решение:

  1. I've just finished cleaning the house. → b I'm really tired.
  2. I've already read that book. → e We gave it to her a week ago.
  3. We haven't studied the grammar yet. → f We can't do this exercise.
  4. Mick has just phoned. → d Have you got another one?
  5. Has the teacher marked our homework yet? → c Is it sandy?
  6. I haven't been to the beach yet. → a He can't go swimming with us.