Dear pupils of 3eme,

Here are some exercises to revise the difference between WHAT and WHICH…

http://perso.wanadoo.es/autoenglish/gr.which.i.htm

http://a4esl.org/q/h/lb/what.html

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-58345.php

what or which? Listen to the teacher!