Defining vs Non-defining relative clauses

Exercises
http://www.edufind.com/ENGLISH/GRAMMAR/REL2.CFM
http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?12http://ies1libertas.edu.gva.es/departamentos/ingles/PDFs/primerob/erelcla1b1.pdf
http://docweb.khk.be/Jen%20Van%20Loock/ex5relativepronouns.htm

http://seulaliaingles.iespana.es/new%20exercises%20for%20the%20web/relative_clauses.htm
Grammar explanation
http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?04
http://perso.wanadoo.es/autoenglish/gr.nonrelat.i.htm

Matilda´s book report

http://edhelper.com/books/Matilda.htm

Matilda´s questions

http://pdf.rincondelvago.com/matilda_roald-dahl_2.htmlhttp://www.roalddahlfans.com/teachers/dahl.php

http://www.emints.org/ethemes/resources/S00000610.shtml

http://sched.sbu.edu/Faculty/pschafer/read510/matilda_content_questions.htm
http://www.funtrivia.com/en/ForChildren/Matilda-13650.htmlhttp://www.webenglishteacher.com/dahl.html
http://www.slideshare.net/egonzalezlara/matilda
http://www.vtaide.com/png/matilda.htm
http://www.edhelper.com/books/MatildaRV.htmhttp://www.roalddahlfans.com/games/quiz.php?quizID=16
http://www.enotes.com/roald-dahl/q-and-a/want-know-10-questions-matilda-by-roald-dahl-88603