1. I am looking for my glasses, without which I can’t watch TV clearly.
2. The house in which I lived was far away from my workplace.
3. The company in/for which I worked was founded five years ago.
4. The address to which my letters were sent was in South Africa.
5. This is the book for which I paid 8 dollars.
6. I remember the day on which I joined the Party.
7. I remember the days during/in which I lived there.
8. I know the reason for which he was late.
9. Is this the play about which you were talking just now?
10. This is the watch for which I am looking.
