1. The Smiths were given rooms in the hotel. Their house had been dstryed in the explosion.(using a relative pronoun)
--> The Smiths whose house had been dstryed in the explosion, were given rooms in the hotel
2. A man was arrested by the police. What was his name? (relative pronoun)
--> What is the name of the person who was arrested by the police.
3. He gave me a lot of advice. Much of them was very useful (relative pronoun)
--> He gave me a lot of advice which of them was very useful.
4. I have heard her on the violin and piano. She plays both of them extremely well( using a relative adverb)
-->The girl who I have heard on the violin and piano , plays both of them extremely well.
5. Mark likes to travel at night. The roads are quiet at that time( relative adverb)
--> Mark likes to travel at night when the roads are quiet
6. I spoke to a shop assistant. She was very nice and helpful( using a preposition+ a relative pronoun)
--> I spoke to a shop assitant who was very nice and helpful
7. In the middle of the village there is a well. The villagers take water from this well to drink ( preposition+ relative pronoun)
--> In the middle of the village there is a well which villager take water from to drink.