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