Present perfect simple and past simple tenses.

http://www.ego4u.com/en/cram-up/tests/present-perfect-simple-1
http://www.ego4u.com/en/cram-up/grammar/simpas-preper/tests?test1

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/tests?test2

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/tests?test3

http://www.englishexercises.org/makeagame/viewgame.asp?id=1496

http://www.better-english.com/grammar/pspp1.htm

http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm