19. That is the tunnel. I went through it.

⇒That is the tunnel which I went through

20. He's the criminal. The police are looking for him.

⇒He's the criminal whom the police are looking for

21. My flat is in an old part of the city. It was built in the 1920s.

⇒ My flat, which was built in the 1920s, is an old part of the city

22. My neighbour comes from Ecuador. He works on the fruit farms around the city.

⇒My neighbour, who works on the fruit farm around the city, comes from Ecuador

23. The neighbour makes a lot of noise walking around. His flat is above mine.

⇒ The neighbor whose  flat is above mine makes a lot os noise walking around

24. The traffic is also very noisy. It passes my flat.

⇒ The traffic  which passes my flat is also very noisy

25. The local market sells excellent local produce. It is a two-minute walk from my flat.

⇒The local market which  is two minute walk from my flat sells excellent local produce

26. John is speaking to his boss. His boss is a famous writer.

⇒ John is walking to his boss who is a famous writer

27. I like the painting. It is in this room.

⇒I like the painting which is in this room

28. The man was sick. He looked very pale

⇒ The man who was sick looked very pale

19.That is the tunnel which I went through.

20.He's the criminal whom the police are looking for.

21.My flat, which was built in the 1920s, is an old part of the city.

22. My neighbour, who works on the fruit farm around the city, comes from Ecuador.

23. The neighbor whose  flat is above mine makes a lot os noise walking around.

24. The traffic  which passes my flat is also very noisy.

25. The local market which  is two minute walk from my flat sells excellent local produce.

26.  John is walking to his boss who is a famous writer.

27. I like the painting which is in this room.

28. The man who was sick looked very pale.