SUBJECT-OBJECT QUESTIONS EXERCISE

http://www.english-zone.com/grammar/questions4.html
http://b1cristina.wordpress.com/2011/04/04/make-questions-for-these-answers-2/

http://www.englishgrammarsecrets.com/pastsimple/exercise5.html

http://www.corvuskft.hu/angol_feladatok/Elementary/julius/write_questions.htm