Just to have fun and practice.
www.englishexercises.org/makeagame/viewgame.asp?id=1734
elt.oup.com/student/solutions/elementary/grammar/grammar_05_022e?cc=global&selLanguage=en
elt.oup.com/student/project3rdedition/level3/unit6/grammar/exercise1?cc=global&selLanguage=en
Should and shouldn't
