DEMONSTRATIVES

http://www.englishexercises.org/makeagame/viewgame.asp?id=4617

http://www.englisch-hilfen.de/en/exercises/various/this_that.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=3039

http://www.englishlanguageworld.com/Beginning_English_Lesson10/Beginning_English_Lesson10_Grammar.html