Friends 2. Fill in the blanks.

Przyjaciele. Wstaw podane słowa w wolne miejsca w zdaniach.
a friend of my father's a friend of yours a friend of the family a friend of mine
1. We call Mr Peters an uncle. He's not our uncle though. He's just   .
2. Sarah, this is Mark. He's   .
3. Peter. There is someone on the phone. He didn't say his name. I think is   .
4. This is Mr Black. He is   . They work together at the factory.