Théorie :

https://la-conjugaison.nouvelobs.com/fle/les-pronoms-relatifs-neutres-la-mise-en-relief-82.php

 

Exercices :

https://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-54800.php

https://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-10154.php

https://www.laits.utexas.edu/tex/gr/pror2.html

http://www.didieraccord.com/exercices/index.php?ex=2.3.2.6

http://www.didieraccord.com/exercices/index.php?ex=2.2.1.6

http://www.maret.at/frz/uebungen/conjonc01.htm

https://www.didierlatitudes.com/exercices/latitudes2/unite-9-latitudes2/reprocher-3/

https://www.estudiodefrances.com/fle-html5/grammaire/cequi-ceque-dedont.html

https://www.lepointdufle.net/ressources_fle/pronoms_relatifs.htm