Should exercises

http://www.englishexercises.org/makeagame/viewgame.asp?id=1734
https://elt.oup.com/student/project3rdedition/level3/unit6/grammar/exercise1?cc=us&selLanguage=en
http://www.englishgrammarsecrets.com/should/exercise1.html
http://www.englishgrammarsecrets.com/should/exercise2.html