Complete the sentences with the names of professions or activities
1. A doctor who treats teeth is
2. A person who paints pictures is
3. A person who types papers is...
4. A person who takes part in public life is ...
5. A scientist who studies the structure of materials is
6. A scientist who studies the structure of organisms is
7. A person who writes books is...
8. A person who knows a lot about his job is....