http://sabrinasanzserrano.blogspot.com.es/2010/11/quelle-heure-est-il-une-parejas-de.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=10305

http://www.englishexercises.org/makeagame/viewgame.asp?id=5173

http://www.englishexercises.org/makeagame/viewgame.asp?id=2065http://www.carmenlu.com/first/grammar/comparison1_2.htm