questions in the present perfect

http://www.englisch-hilfen.de/en/exercises/questions/present_perfect.htm
http://www.englisch-hilfen.de/en/exercises/questions/present_perfect2.htm

 http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?08

http://first-english.org/english_learning/english_tenses/present_perfect/30_present_perfect_questions.htm

http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?07

http://first-english.org/english_learning/english_tenses/present_perfect/31_present_perfect_questions_regular_verbs.htm

http://first-english.org/english_learning/english_tenses/present_perfect/35_present_perfect_fragen_irregular_verbs.htm

http://first-english.org/english_learning/english_tenses/present_perfect/40_present_perfect_questions_verbs.htm

http://first-english.org/english_learning/english_tenses/present_perfect/45_present_perfect_questions_word_order.htm

http://first-english.org/english_learning/english_tenses/present_perfect/46_present_perfect_questions.htm