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ANSWER KEY:
1. (the explosion) The explosion which/ that I heard where I was standing was very loud.
2. (the earthquake) The earthquake which/ that happened in 2010 claimed thousands of lives.
3. (people) People who/ that live in the countryside are in great danger because of the drought.
4. (earthquake crater) Earthquake crater which/ that I saw many pictures of before is a fantastic place to see.
5. (the firefighter) The journalists interviewed the firefighter on TV who/ that saved many children from the fire.
6. (the injured dog) I took the injured dog whose/ of which leg was broken to the vet.
7. (semi-tropical vegetation) We have a garden of semi-tropical vegetation where many exotic flowers live.
We have a garden of semi-tropical vegetation in which many exotic flowers live.
We have a garden of semi-tropical vegetation that/ which many exotic flowers live in.
We have a garden of semi-tropical vegetation many exotic flowers live in.
8. (a reason) The scientists gave a reason for the climate change at the conference that/ which is caused by humans.
9. (the volcano) They take me to the volcano where I found this rock.
They take me to the volcano at which I found this rock.
They take me to the volcano that I found this rock at.
They take me to the volcano I found this rock at.
10. (this glacier) This glacier on whose surface you can see some polar bears is the biggest in the North Pole.
This glacier on the surface of which you can see some polar bears is the biggest in the North Pole.
