Present Perfect practise!!
https://www.learnclick.com/mchoice/show/878
http://www.impact-english.com/members/Grammar_Practice/Always/test-grammar/gr_prac_use-PPrf.htm
http://www.englishlab.net/hp/quiz18_past_simple_present_perfect_1.htm
http://www.perfect-english-grammar.com/past-simple-present-perfect-3.HTML
http://www.perfect-english-grammar.com/past-simple-present-perfect-2.html
https://www.ego4u.com/en/cram-up/grammar/simpas-preper/tests?test2
https://www.ego4u.com/en/cram-up/grammar/simpas-preper/tests?test3
http://www.agendaweb.org/verbs/present-perfect-simple-past-simple-exercises.html
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