Revision of pronouns - introducing relative pronouns

Sometimes it's good to revise things we already know to check we don't have problems. That's the reason why I've seen this presentation really useful. But it introduces something we haven't seen very well and we should revise in class next week: relative clauses using relative pronouns as linkers. Here is the presentation:
http://www.slideshare.net/Marimerry/relative-clauses-6131978
Once you've seen this, go to this other presentation about the relative clauses (oraciones de relativo) but don't worry too much if you can't understand everything because we'll see it in classs next week. About relative clauses go to:
http://www.slideshare.net/mluisavm/relative-clauses-10934852
If you've been able to understand most of the explanation, go to these links to practise but remember you should practise these sentences by saying them aloud to get used to them:

• http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns.htm : to revise relative pronouns
• http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?02 : more about pronouns
• http://www.eflnet.com/grammar/relpronoun.php: and some more
• http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?07 : how to join sentences; this exercise is more useful for preparing your writing exam
• http://www.esltower.com/GRAMMARQUIZ/intermediate/relative%20pronoun.htm : similar to the previous one but simpler and faster. Good for revision
• http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?08 : another one for revision

I hope this entry will help you but I'll revise this in class. However, if you've alredy seen all these explanations we'll do it very quickly. See you.
PD: for those who love exercises here you have a huge amount with different levels
http://www.agendaweb.org/grammar/relative_pronouns_clauses-exercises.html