There is, there are

http://www.agendaweb.org/grammar/there_is_are-exercises.html

 

http://www.englisch-hilfen.de/en/exercises/various/there_is_there_are.htm

http://www.anglomaniacy.pl/grammar-verbs-practise3.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=4627

http://www.englishexercises.org/makeagame/viewgame.asp?id=5272

http://www.englishexercises.org/makeagame/viewgame.asp?id=2920