Hi again!

Here you can find some exercises to practice with Relative Pronouns for your exam:

https://www.ego4u.com/en/cram-up/tests/relative-clauses-4

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

https://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns2.htm

http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=1255