PRESENT PERFECT

http://www.curso-ingles.com/aprender/cursos/nivel-avanzado/verb-tenses-present-perfect/present-perfect

http://www.agendaweb.org/exercises/verbs/present-perfect-2

http://www.agendaweb.org/exercises/verbs/present-perfect

http://www.curso-ingles.com/practicar/ejercicios/present-perfect

http://www.englishpage.com/verbpage/verbs5.htm

http://www.saberingles.com.ar/curso/lesson21/06.html

http://www.agendaweb.org/exercises/verbs/present-perfect-sentences

http://mrbrownslearningspace.com/wp-content/uploads/2015/01/Present_Perfect_1.htm

https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?03

http://www.agendaweb.org/exercises/verbs/present-perfect-multiple

http://www.agendaweb.org/exercises/verbs/present-perfect-mixed

http://www.nspeak.com/newbasic/grammatica/presperfect.htm

http://mrbrownslearningspace.com/wp-content/uploads/2015/01/Present_Perfect_2.htm

http://www.montsemorales.com/gramatica/PresPerf1.htm