present perfect practice

2nd year people! As promised!
Download the practice:
http://docs.google.com/Doc?docid=0AZ8P_1tdKyUVZGY5Mmg3cGdfNjJnNGprMnNmaA&hl=en

and there's some theory and mooooreee practice:
http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple
http://www.saberingles.com.ar/curso/lesson21/06.html