Nº Enlace Autor
1

url Practice Strange Questions (subect and object questions)

http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1535_questionanswer/page53.shtml

Karla Villalobos A.

4 Abr 200704/04/072007-04-04
2

url Study here

http://www.oup.com/elt/global/products/headway/preintermediate/

Karla Villalobos A.

4 Abr 200704/04/072007-04-04