Relative pronouns

The town ... I live has a population of 50,000 people.

My friend Mike, ... father is an architect, wants to be an engineer.

The park ... he usually goes running is across the road.

I don't know ... things are these.

I don't know to ... I should address this letter.

I'll tell you ... I left the party so early.

His friend, ... name is Luis, speaks three languages.

The computer, ... he bought, is very expensive.

People ... live in glass houses shouldn't throw stones.

She is not the person, with ...I'd like to share my room.