1.    I have worked as a volunteer for three years.

      I starte _______________________________________________.

2.    She has been a member of the Peace Corps for two years.

      She became .

3.    The last time he donated blood was ten years ago.

      It has _______________________________________________.

4.    He started to work for this non-profit organisation five years ago.

      He has _______________________________________________.

5.    He has never had such an interesting experience.

     This is _______________________________________________.