Combine each pair of sentences into one, using relative pronouns / adverbs
1. April Fools Day is the day. People play tricks on friends on that day

=> April Fools Day is the day when peope play tricks on friends
2. I'll show you the stadium.  It was built two year ago

=> I'll show you the stadium which was built two years ago
3 . The English writer is Charles Dickens. I like to read his novels 

=> The English writer whose novels I like to read is Charles Dickens
4. The street is very wide. It leads me to my school

=> The street which leads me to my school is very wide
5.  Swimming makes people strong . Swimming is a good sport 

=> Swimming is a good sport which makes people strong