Le complément OI

http://www.estudiodefrances.com/peli/pronomsindirects.html

http://www.didieraccord.com/exercices/index.php?ex=4.2.9

http://www.kubbu.com/student/?i=1&a=13850_les_pronoms_coi

Le verbe PLAIRE: http://faculty.mansfield.edu/bholtman/holtman/102F/exercises/plaire.htm