paginas para consultar
- http://blog.mansioningles.net/
- http://iteslj.org/guides/dining.html
- http://www.auladiez.com/ejercicios/
- http://www.bbc.co.uk/science/humanbody/sleep/tmt/instructions_1.shtml
- http://www.brl.ntt.co.jp/people/hara/fly.swf
- http://www.elosiodelosantos.com/sergiman/index.html
- http://www.learnenglishfeelgood.com/sp/index.html
- http://www.saberingles.com.ar/games/index.html
- http://www.starfall.com/n/plays/guess/load.htm?f