Choose the correct preposition in each sentence

1. I don't like the idea of working in/for/by someone.
2. Paul joined us to/for/as a research assistant.
3. To join a team as/of /for experts, ring this number.
4. A knowledge in/of /for wildlife is desirable.
5. I have always enjoyed working for / with / by animals.
6. Send in a CV when applying in / to/for a job.
7. I am interested for/in/ to the job advertised.
8. Maria has always been fascinated in / with /by wildlife.
9. Sam represented his school of /at/with sports.
10. We look forward to /of /for hearing from you.