PLURALS

http://www.englisch-hilfen.de/en/grammar/plural.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=723

Prepositions of time IN, AT, ON

http://www.englishexercises.org/makeagame/viewgame.asp?id=5278

http://www.englisch-hilfen.de/en/exercises/structures/prepositions_at_in_on_time.htm
  

TO BE EXERCISES
http://www.englishexercises.org/makeagame/viewgame.asp?id=2813

Countries and nationalities: Interactive quiz

http://www.quia.com/quiz/1885402.html

Billionaire Countries & Nationalities Vocabulary Game

http://www.eslgamesworld.com/members/games/ClassroomGames/Billionaire/Countries%20Nationalities%20Billionaire/play.html