Grammar: present continuous

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2. http://www.juntadeandalucia.es/averroes/torredelprado/ingles/presentcont1.htm
3. http://www.montsemorales.com/gramatica/PresCont0.htm
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5. http://www.englishexercises.org/makeagame/viewgame.asp?id=1703
6. http://www.adelescorner.org/grammar/pres_cont/pres_simple_cont.html
7. http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%2014.htm
8. http://www.englishexercises.org/makeagame/viewgame.asp?id=1032
9. http://www.juntadeandalucia.es/averroes/torredelprado/ingles/presentcont8.htm
10. http://www.adelescorner.org/grammar/pres_cont/pres_cont_1.html
11. http://www.eflnet.com/grammar/presprogfill.php
12. http://www.learn-english-online.org/Lesson7/TestIt/PresCont1.htm
13. http://www.englishexercises.org/makeagame/viewgame.asp?id=983
14. http://www.englishexercises.org/makeagame/viewgame.asp?id=2357
15. http://www.englishexercises.org/makeagame/viewgame.asp?id=1788
16. http://www.kico4u.de/english/uebungen/5klasse/whatsgoingon.htm
17. http://www.adelescorner.org/grammar/pres_cont/pres_cont_2.html
18. http://www.adelescorner.org/grammar/pres_cont/pres_cont_quests.html
19. http://www.adelescorner.org/grammar/pres_cont/pres_cont_neg.html
20. http://www.juntadeandalucia.es/averroes/torredelprado/ingles/presentcont9.htm