Relative Clauses - How to Join Sentences Correctly

Review: What are relative clauses and how to use them correctly

https://www.perfect-english-grammar.com/relative-clauses.html 

Exercises to practice combining two sentences into one:

http://www.perfect-english-grammar.com/relative-clauses-exercise-1.html 

Relative clause exercise in context. Read a paragraph and identify the relative clauses:                                    

https://nagelhout.faculty.unlv.edu/AGiC/Practice/s6/s6x04/#q1_0

Defining relative clauses, non-defining relative clauses: explanation and exercises

https://learnenglish.britishcouncil.org/grammar/english-grammar-reference/relative-pronouns-and-relative-clauses