GENITIVE CASE

http://www.englisch-hilfen.de/en/exercises/nouns_articles/apostrophe_s.htm

http://www.autoenglish.org/basic/possessivepal/possessive.html

http://suz.digitaleschulebayern.de/english/grammar/saxong3.htm

http://resources.hwb.wales.gov.uk/VTC/apostrophes_possess/eng/Introduction/act3.swf

http://first-english.org/english_learning/english_beginners/s_genitive_exercises/01_s_genitive_exercises.htm

POSSESSIVE ADJECTIVES

http://www.english-area.com/paginas/possessivesbasico.htm

http://mbonillo.xavierre.com/exercises/eso1/1eso2007/possessives1.htm

http://www.montsemorales.com/gramatica/Pronounandadjec.htm

http://www.montsemorales.com/gramatica/Possessiv2.htm

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5592.php

http://mrsc.free.fr/6-6-07-adjpos.htm

THIS - THESE (NEAR) AND THAT-THOSE (FAAAAAAAAAR)

http://www.englishexercises.org/makeagame/viewgame.asp?id=1941

http://www.adelescorner.org/grammar/this_that/this_these.html

http://www.adelescorner.org/grammar/this_that/that_those.html

http://www.adelescorner.org/grammar/this_that/this_etc.html

http://eolf.univ-fcomte.fr/wp-content/uploads/grammar/this_that_these_those/01.htm