Составить 5 пар предложений active-passive

1 Students take exams twice a year. (Present Simple Active)

  Exams are taken by students twice a year. (Present Simple Passive)

2 Ann is writing a letter now. (Present Continuous Active)

  A letter is being written by Ann now. (Present Continuous Passive)

3 Next year they will build a bridge here. (Future Simple Active)

  Next year a bridge will be built here. (Future Simple Passive)

4 James Cameron wrote and directed Avatar. (Past Simple Active)

  Avatar was written and directed by James Cameron. (Past Simple Passive)

5 I have just written this letter. (Present Perfect Active)

  This letter has just been written by me. (Present Perfect Passive)