3.) has taken (Active voice)

4.) pushed (Active voice)

5.) was pushed (Passive voice)

6.) is being repaired (Passive voice)

7.) invented (Active voice)

8.) was the camera invented (Passive voice)

9.) have been washed (Passive voice)

10.) have washed (Active voice)

11.) have they sent (Active voice)

12.) will be sent (Passive voice)