http://www.didieraccord.com/exercices/?ex=2.1.1.2
http://www.didieraccord.com/exercices/?ex=2.1.1.4
http://claweb.cla.unipd.it/home/smazurelle/dynamots/a1/m3/ae_gallicis.html
http://staffweb.hkbu.edu.hk/reyjeanl/hotpot/temps-1-onl.htm
